拷贝APP_Bck20250119项目源码，移除libjc/jcc/libs/android-29.jar文件。

libjc/build.gradle

@@ -0,0 +1,33 @@
+apply plugin: 'com.android.library'
+
+android {
+    //compileSdkVersion 21
+    //buildToolsVersion "21.1.0"
+    compileSdkVersion 32
+    buildToolsVersion "33.0.3"
+
+    defaultConfig {
+        //applicationId "cc.winboll.studio.libjc"
+        //minSdkVersion 14
+        //targetSdkVersion 21
+        minSdkVersion 24
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    // https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on
+    //implementation 'org.bouncycastle:bcprov-jdk15on:1.70'
+    implementation 'org.bouncycastle:bcprov-jdk15to18:1.69'
+    implementation 'org.bouncycastle:bcpkix-jdk15to18:1.69'
+
+    api fileTree(dir: 'libs', include: ['*.jar'])
+}