添加下载图片预览模块(未调试)
This commit is contained in:
@@ -1,8 +1,8 @@
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#Created by .winboll/winboll_app_build.gradle
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#Wed Nov 19 12:22:35 GMT 2025
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#Wed Nov 19 13:23:38 GMT 2025
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stageCount=4
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libraryProject=
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baseVersion=15.11
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publishVersion=15.11.3
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buildCount=15
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buildCount=19
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baseBetaVersion=15.11.4
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@@ -1,14 +1,21 @@
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package cc.winboll.studio.powerbell.dialogs;
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import android.content.Context;
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import android.graphics.drawable.Drawable;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.ImageView;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AlertDialog; // AndroidX 对话框
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import cc.winboll.studio.powerbell.R;
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import androidx.appcompat.app.AlertDialog;
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import cc.winboll.studio.libappbase.LogUtils;
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import cc.winboll.studio.libappbase.ToastUtils;
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import cc.winboll.studio.powerbell.R;
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import cc.winboll.studio.powerbell.utils.ImageDownloader;
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import java.io.FileInputStream;
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import java.io.IOException;
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/**
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* @Author ZhanGSKen&豆包大模型<zhangsken@qq.com>
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@@ -17,12 +24,18 @@ import cc.winboll.studio.libappbase.LogUtils;
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* 继承 AndroidX AlertDialog,绑定自定义布局 dialog_networkbackground.xml
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*/
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public class NetworkBackgroundDialog extends AlertDialog {
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public static final String TAG = "NetworkBackgroundDialog";
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// 控件引用
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private TextView tvTitle;
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private TextView tvContent;
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private Button btnCancel;
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private Button btnConfirm;
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private Button btnPreview;
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private EditText etURL;
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//private WebView webViewPreview;
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ImageView ivBackgroundPreview;
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Context mContext;
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// 按钮点击回调接口(Java7 接口实现)
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public interface OnDialogClickListener {
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@@ -49,9 +62,10 @@ public class NetworkBackgroundDialog extends AlertDialog {
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* 初始化布局和控件
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*/
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private void initView() {
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mContext = this.getContext();
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// 加载自定义布局
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View dialogView = LayoutInflater.from(getContext())
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.inflate(R.layout.dialog_networkbackground, null);
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.inflate(R.layout.dialog_networkbackground, null);
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// 设置对话框内容视图
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setView(dialogView);
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@@ -60,6 +74,10 @@ public class NetworkBackgroundDialog extends AlertDialog {
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tvContent = (TextView) dialogView.findViewById(R.id.tv_dialog_content);
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btnCancel = (Button) dialogView.findViewById(R.id.btn_cancel);
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btnConfirm = (Button) dialogView.findViewById(R.id.btn_confirm);
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btnPreview = (Button) dialogView.findViewById(R.id.btn_preview);
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etURL = (EditText) dialogView.findViewById(R.id.et_url);
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//webViewPreview = (WebView) dialogView.findViewById(R.id.webview_preview);
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ivBackgroundPreview = (ImageView) findViewById(R.id.iv_background_preview);
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// 设置按钮点击事件
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setButtonClickListeners();
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@@ -71,27 +89,37 @@ public class NetworkBackgroundDialog extends AlertDialog {
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private void setButtonClickListeners() {
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// 取消按钮:关闭对话框 + 回调外部
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btnCancel.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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LogUtils.d("NetworkBackgroundDialog", "取消按钮点击");
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dismiss(); // 关闭对话框
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if (listener != null) {
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listener.onCancel();
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}
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}
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});
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@Override
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public void onClick(View v) {
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LogUtils.d("NetworkBackgroundDialog", "取消按钮点击");
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dismiss(); // 关闭对话框
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if (listener != null) {
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listener.onCancel();
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}
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}
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});
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// 确认按钮:关闭对话框 + 回调外部
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btnConfirm.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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LogUtils.d("NetworkBackgroundDialog", "确认按钮点击");
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dismiss(); // 关闭对话框
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if (listener != null) {
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listener.onConfirm();
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}
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}
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});
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@Override
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public void onClick(View v) {
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LogUtils.d("NetworkBackgroundDialog", "确认按钮点击");
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dismiss(); // 关闭对话框
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if (listener != null) {
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listener.onConfirm();
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}
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}
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});
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// 图片预览按钮:预览输入框地址图片
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btnPreview.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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LogUtils.d("NetworkBackgroundDialog", "确认预览点击");
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String url = etURL.getText().toString();
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ImageDownloader.getInstance(mContext).downloadImage(url, mDownloadCallback);
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}
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});
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}
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/**
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@@ -118,5 +146,50 @@ public class NetworkBackgroundDialog extends AlertDialog {
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public void setOnDialogClickListener(OnDialogClickListener listener) {
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this.listener = listener;
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}
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ImageDownloader.DownloadCallback mDownloadCallback = new ImageDownloader.DownloadCallback(){
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@Override
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public void onSuccess(String filePath) {
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ToastUtils.show(filePath);
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LogUtils.d(TAG, filePath);
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String imagePath = "/storage/emulated/0/Android/data/cc.winboll.studio.powerbell.beta/files/mmexport1713182627221.png";
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//String imagePath = filePath;
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FileInputStream fis = null;
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try {
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fis = new FileInputStream(imagePath);
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Drawable drawable = Drawable.createFromStream(fis, null);
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// 设置背景
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if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
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ivBackgroundPreview.setBackground(drawable);
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} else {
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ivBackgroundPreview.setBackgroundDrawable(drawable);
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}
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} catch (Exception e) {
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e.printStackTrace();
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//ivBackgroundPreview.setBackgroundResource(R.drawable.default_error); // 异常时显示默认图
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ivBackgroundPreview.setBackgroundResource(R.drawable.ic_launcher); // 异常时显示默认图
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} finally {
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// Java7 手动关闭流,避免资源泄漏
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if (fis != null) {
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try {
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fis.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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@Override
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public void onFailure(String errorMsg) {
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ToastUtils.show(errorMsg);
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LogUtils.d(TAG, errorMsg);
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}
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};
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}
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@@ -0,0 +1,294 @@
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package cc.winboll.studio.powerbell.utils;
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import android.content.Context;
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import android.os.Environment;
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import android.text.TextUtils;
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import android.util.Log;
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import cc.winboll.studio.libappbase.LogUtils;
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import okhttp3.Call;
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import okhttp3.Callback;
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import okhttp3.OkHttpClient;
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import okhttp3.Request;
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import okhttp3.Response;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.UUID;
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import java.util.concurrent.TimeUnit;
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/**
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* @Author ZhanGSKen&豆包大模型<zhangsken@qq.com>
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* @Date 2025/11/19 20:52
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* @Describe 图片下载工具类(单例模式)
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* 功能:下载网络图片到缓存目录、清理过期文件、获取最新下载文件
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*/
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public class ImageDownloader {
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public static final String TAG = "ImageDownloader";
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// 单例实例
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private static ImageDownloader sInstance;
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// OkHttp 客户端(全局复用,提升性能)
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private OkHttpClient mOkHttpClient;
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// 缓存目录:/data/data/应用包名/cache/networkdownload
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private File mCacheDir;
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// 过期时间:7天(单位:毫秒),可按需调整
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private static final long EXPIRE_TIME = 7 * 24 * 3600 * 1000;
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/**
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* 私有构造(单例模式禁止外部实例化)
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* @param context 上下文(用于获取缓存目录)
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*/
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private ImageDownloader(Context context) {
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// 初始化 OkHttp 客户端(设置超时时间)
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mOkHttpClient = new OkHttpClient.Builder()
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.connectTimeout(10, TimeUnit.SECONDS)
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.readTimeout(15, TimeUnit.SECONDS)
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.writeTimeout(15, TimeUnit.SECONDS)
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.build();
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// 初始化缓存目录:networkdownload
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initCacheDir(context);
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// 初始化时清理过期文件
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clearExpiredFiles();
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}
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/**
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* 单例获取方法(线程安全)
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* @param context 上下文(建议使用 Application 上下文避免内存泄漏)
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* @return 单例实例
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*/
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public static synchronized ImageDownloader getInstance(Context context) {
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if (sInstance == null) {
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// 使用 Application 上下文,防止 Activity 销毁导致的内存泄漏
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sInstance = new ImageDownloader(context.getApplicationContext());
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}
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return sInstance;
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}
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/**
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* 初始化缓存目录:若不存在则创建
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*/
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private void initCacheDir(Context context) {
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// 获取应用内置缓存目录(无需权限)
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File cacheRoot = context.getCacheDir();
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mCacheDir = new File(cacheRoot, "networkdownload");
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// 若目录不存在则创建(包括父目录)
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if (!mCacheDir.exists()) {
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boolean isCreated = mCacheDir.mkdirs();
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if (isCreated) {
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LogUtils.d("ImageDownloader", "networkdownload 缓存目录创建成功:" + mCacheDir.getAbsolutePath());
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} else {
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LogUtils.e("ImageDownloader", "networkdownload 缓存目录创建失败");
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}
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} else {
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LogUtils.d("ImageDownloader", "networkdownload 缓存目录已存在:" + mCacheDir.getAbsolutePath());
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}
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}
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/**
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* 清理过期文件(最后修改时间超过 EXPIRE_TIME 的文件)
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*/
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private void clearExpiredFiles() {
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if (mCacheDir == null || !mCacheDir.exists()) {
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return;
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}
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File[] files = mCacheDir.listFiles();
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if (files == null || files.length == 0) {
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LogUtils.d("ImageDownloader", "缓存目录无文件,无需清理");
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return;
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}
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long currentTime = System.currentTimeMillis();
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int deleteCount = 0;
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// 遍历所有文件,删除过期文件
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for (File file : files) {
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long lastModifyTime = file.lastModified();
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if (currentTime - lastModifyTime > EXPIRE_TIME) {
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if (file.delete()) {
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deleteCount++;
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LogUtils.d("ImageDownloader", "删除过期文件:" + file.getName());
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} else {
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LogUtils.e("ImageDownloader", "删除过期文件失败:" + file.getName());
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}
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}
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}
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LogUtils.d("ImageDownloader", "过期文件清理完成,共删除 " + deleteCount + " 个文件");
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}
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/**
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* 下载网络图片到缓存目录
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* @param imageUrl 图片网络链接
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* @param callback 下载结果回调(成功/失败)
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*/
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public void downloadImage(final String imageUrl, final DownloadCallback callback) {
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// 校验参数
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if (TextUtils.isEmpty(imageUrl)) {
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if (callback != null) {
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callback.onFailure("图片链接为空");
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}
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return;
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}
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if (mCacheDir == null || !mCacheDir.exists()) {
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if (callback != null) {
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callback.onFailure("缓存目录不存在");
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}
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return;
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}
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// 构建 OkHttp 请求
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Request request = new Request.Builder()
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.url(imageUrl)
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.build();
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// 异步下载(避免阻塞主线程)
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mOkHttpClient.newCall(request).enqueue(new Callback() {
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@Override
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public void onFailure(Call call, IOException e) {
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// 下载失败,回调主线程
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if (callback != null) {
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callback.onFailure("下载失败:" + e.getMessage());
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}
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LogUtils.e("ImageDownloader", "图片下载失败:" + e.getMessage());
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}
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@Override
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public void onResponse(Call call, Response response) throws IOException {
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if (!response.isSuccessful()) {
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// 响应失败(如 404、500)
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if (callback != null) {
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callback.onFailure("响应失败:" + response.code());
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}
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LogUtils.e("ImageDownloader", "图片响应失败,状态码:" + response.code());
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return;
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}
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// 响应成功,写入文件
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InputStream inputStream = null;
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FileOutputStream outputStream = null;
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try {
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inputStream = response.body().byteStream();
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// 生成 UUID 唯一文件名(保留原文件后缀)
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String fileExtension = getFileExtension(imageUrl);
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String fileName = UUID.randomUUID().toString() + fileExtension;
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File imageFile = new File(mCacheDir, fileName);
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// 写入文件
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outputStream = new FileOutputStream(imageFile);
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byte[] buffer = new byte[1024];
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int len;
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while ((len = inputStream.read(buffer)) != -1) {
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outputStream.write(buffer, 0, len);
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}
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outputStream.flush();
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// 下载成功,回调主线程并返回文件路径
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if (callback != null) {
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callback.onSuccess(imageFile.getAbsolutePath());
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}
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LogUtils.d("ImageDownloader", "图片下载成功:" + imageFile.getAbsolutePath());
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} catch (IOException e) {
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if (callback != null) {
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callback.onFailure("文件写入失败:" + e.getMessage());
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}
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LogUtils.e("ImageDownloader", "图片写入失败:" + e.getMessage());
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} finally {
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// 关闭流(Java7 手动关闭,避免资源泄漏)
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if (inputStream != null) {
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try {
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inputStream.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (outputStream != null) {
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try {
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outputStream.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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// 关闭响应体
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if (response.body() != null) {
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response.body().close();
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}
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}
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}
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});
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}
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/**
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* 获取 networkdownload 目录中最后下载的文件(按修改时间排序)
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* @return 最后下载的文件路径(null 表示无文件)
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*/
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public String getLastDownloadedFile() {
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if (mCacheDir == null || !mCacheDir.exists()) {
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LogUtils.e("ImageDownloader", "缓存目录不存在");
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return null;
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}
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File[] files = mCacheDir.listFiles();
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if (files == null || files.length == 0) {
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LogUtils.d("ImageDownloader", "缓存目录无文件");
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return null;
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}
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// 按最后修改时间降序排序,取第一个即为最新文件
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File lastFile = files[0];
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for (File file : files) {
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if (file.lastModified() > lastFile.lastModified()) {
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lastFile = file;
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}
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}
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LogUtils.d("ImageDownloader", "最后下载的文件:" + lastFile.getAbsolutePath());
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return lastFile.getAbsolutePath();
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}
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/**
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* 工具方法:从图片链接中提取文件后缀(如 .png、.jpg)
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* @param imageUrl 图片链接
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* @return 文件后缀(含点号,若无法提取则返回 .jpg)
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*/
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private String getFileExtension(String imageUrl) {
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if (TextUtils.isEmpty(imageUrl)) {
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return ".jpg";
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}
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|
||||
int lastDotIndex = imageUrl.lastIndexOf(".");
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||||
int lastSlashIndex = imageUrl.lastIndexOf("/");
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||||
// 确保后缀在最后一个斜杠之后,且长度合理(1-5 个字符)
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if (lastDotIndex > lastSlashIndex && lastDotIndex < imageUrl.length() - 1) {
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||||
String extension = imageUrl.substring(lastDotIndex);
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||||
if (extension.length() <= 5) {
|
||||
return extension.toLowerCase(); // 统一转为小写
|
||||
}
|
||||
}
|
||||
|
||||
// 无法提取后缀时,默认使用 .jpg
|
||||
return ".jpg";
|
||||
}
|
||||
|
||||
/**
|
||||
* 下载结果回调接口(Java7 接口实现)
|
||||
*/
|
||||
public interface DownloadCallback {
|
||||
/**
|
||||
* 下载成功
|
||||
* @param filePath 图片保存路径
|
||||
*/
|
||||
void onSuccess(String filePath);
|
||||
|
||||
/**
|
||||
* 下载失败
|
||||
* @param errorMsg 失败原因
|
||||
*/
|
||||
void onFailure(String errorMsg);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,60 +1,93 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_margin="16dp"
|
||||
android:orientation="vertical"
|
||||
android:background="@android:color/white"
|
||||
android:padding="20dp"
|
||||
android:radius="12dp"> <!-- 圆角背景(需Android 5.0+,低版本可改用shapedrawable) -->
|
||||
<LinearLayout
|
||||
xmlns:android="http://schemas.android.com/apk/res/android"
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_margin="16dp"
|
||||
android:orientation="vertical"
|
||||
android:background="@android:color/white"
|
||||
android:padding="20dp"
|
||||
android:radius="12dp">
|
||||
|
||||
<!-- 标题 -->
|
||||
<TextView
|
||||
android:id="@+id/tv_dialog_title"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="网络后台提示"
|
||||
android:textSize="18sp"
|
||||
android:textColor="@android:color/black"
|
||||
android:textStyle="bold" />
|
||||
<TextView
|
||||
android:id="@+id/tv_dialog_title"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="网络后台提示"
|
||||
android:textSize="18sp"
|
||||
android:textColor="@android:color/black"
|
||||
android:textStyle="bold"/>
|
||||
|
||||
<!-- 内容说明 -->
|
||||
<TextView
|
||||
android:id="@+id/tv_dialog_content"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="12dp"
|
||||
android:text="应用正在后台使用网络,是否继续允许?"
|
||||
android:textSize="15sp"
|
||||
android:textColor="@android:color/darker_gray" />
|
||||
<LinearLayout
|
||||
android:orientation="horizontal"
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="12dp">
|
||||
|
||||
<!-- 按钮容器(水平排列) -->
|
||||
<LinearLayout
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="20dp"
|
||||
android:orientation="horizontal"
|
||||
android:gravity="end">
|
||||
<EditText
|
||||
android:layout_width="0dp"
|
||||
android:ems="10"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_weight="1.0"
|
||||
android:id="@+id/et_url"/>
|
||||
|
||||
<!-- 取消按钮 -->
|
||||
<Button
|
||||
android:id="@+id/btn_cancel"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="取消"
|
||||
android:textSize="14sp"
|
||||
android:background="@android:drawable/btn_default_small"
|
||||
android:layout_marginRight="8dp" />
|
||||
<Button
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="↻"
|
||||
android:id="@+id/btn_preview"/>
|
||||
|
||||
<!-- 确认按钮 -->
|
||||
<Button
|
||||
android:id="@+id/btn_confirm"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="允许"
|
||||
android:textSize="14sp"
|
||||
android:background="@android:drawable/btn_default_small" />
|
||||
</LinearLayout>
|
||||
|
||||
</LinearLayout>
|
||||
<LinearLayout
|
||||
android:orientation="horizontal"
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="100dp"
|
||||
android:layout_marginTop="12dp"
|
||||
android:layout_gravity="center_vertical">
|
||||
|
||||
<ImageView
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="12dp"
|
||||
android:id="@+id/iv_background_preview"/>
|
||||
|
||||
</LinearLayout>
|
||||
|
||||
<TextView
|
||||
android:id="@+id/tv_dialog_content"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="12dp"
|
||||
android:text="应用正在后台使用网络,是否继续允许?"
|
||||
android:textSize="15sp"
|
||||
android:textColor="@android:color/darker_gray"/>
|
||||
|
||||
<LinearLayout
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="wrap_content"
|
||||
android:layout_marginTop="20dp"
|
||||
android:orientation="horizontal"
|
||||
android:gravity="end">
|
||||
|
||||
<Button
|
||||
android:id="@+id/btn_cancel"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="取消"
|
||||
android:textSize="14sp"
|
||||
android:background="@android:drawable/btn_default_small"
|
||||
android:layout_marginRight="8dp"/>
|
||||
|
||||
<Button
|
||||
android:id="@+id/btn_confirm"
|
||||
android:layout_width="wrap_content"
|
||||
android:layout_height="wrap_content"
|
||||
android:text="允许"
|
||||
android:textSize="14sp"
|
||||
android:background="@android:drawable/btn_default_small"/>
|
||||
|
||||
</LinearLayout>
|
||||
|
||||
</LinearLayout>
|
||||
|
||||
|
||||
Reference in New Issue
Block a user