以下是报错信息:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.whut.imageencryptionapp, PID: 31941
java.lang.RuntimeException:
**Unable to instantiate activity ComponentInfo****{com.whut.imageencryptionapp/com.whut.imageencryptionapp.ui.ImageHandleActivity}: **java.lang.ClassCastExceptio**n: com.whut.imageencryptionapp.ui.ImageHandleActivity **cannot be cast to android.app.Activity **
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3678)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3939)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:8147)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)
Caused by: java.lang.ClassCastException: com.whut.imageencryptionapp.ui.ImageHandleActivity cannot be cast to android.app.Activity
at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:95)
at android.support.v4.app.CoreComponentFactory.instantiateActivity(CoreComponentFactory.java:43)
at android.app.Instrumentation.newActivity(Instrumentation.java:1257)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3663)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3939)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:8147)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)
DeImagePickActivity相关代码如下:
case R.id.iv_image_show_activity_back:
/*
Intent intent = new Intent(this, ImageHandleActivity.class);
startActivity(intent);
FragmentManager fragmentManager;
Fragment fragment = new ImageHandleActivity();
fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.rl_fragment1, fragment).commit();
fragmentTransaction = fragmentManager.beginTransaction();
ImageHandleActivity imageHandleActivity = new ImageHandleActivity();
fragmentTransaction.replace(R.id.ll_de, imageHandleActivity).commit();
*/
ImageHandleActivity imageHandleActivity = new ImageHandleActivity();
FragmentManager fragmentManager;
fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.rl_fragment1,imageHandleActivity).commit();
Intent intent = new Intent(this,ImageHandleActivity.class);
startActivity(intent);
注释中都是我尝试过的方法,但是还是会出现异常。
我要从DeImagePickActivity跳转到ImageHandleActivity,其中ImageHandleActivity继承了Fragment,他的Activity是MainActivity。
感谢解答!