小编Chu*_*dey的帖子

我正在尝试制作自定义相机应用程序,但每当我运行我的程序时,

得到 -

不幸的是App已经停止了

logcat的:

05-30 14:47:09.844: D/CameraCaptureActivity(797): getCameraInstance()Camera:: null
05-30 14:47:09.855: D/CameraCaptureActivity(797): getCameraInstance()open:: null
05-30 14:47:09.855: D/CameraCaptureActivity(797): mCamera:: null
05-30 14:47:09.895: D/CameraCaptureActivity(797): mCamera :: null
05-30 14:47:09.895: D/CameraCaptureActivity(797): mSurfaceHolder :: android.view.SurfaceView$4@40d06ef8
05-30 14:47:09.924: D/CameraCaptureActivity(797): mCameraPreview :: com.example.demo.CameraPreview{40d06860 V.E..... ......I. 0,0-0,0}
05-30 14:47:09.924: D/CameraCaptureActivity(797): FrameLayout :: android.widget.FrameLayout{40cfa7d8 V.E..... ......I. 0,0-0,0 #7f080000 app:id/camera_preview}
05-30 14:47:09.954: D/CameraCaptureActivity(797): captureButton :: android.widget.Button{40cfad50 VFED..C. ......I. 0,0-0,0 #7f080001 app:id/button_capture}
05-30 14:47:04.327: D/AndroidRuntime(797): Shutting down VM
05-30 14:47:04.327: W/dalvikvm(797): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-30 …

我正在使用本教程:

http://www.vogella.com/articles/AndroidCamera/article.html

要捕获图像并将其保存在SD卡上,但每当我运行此程序时,获取:不幸的是App已停止

错误说:

引起:java.lang.reflect.InvocationTargetException

第39行是:

camera.takePicture(null,null,new PhotoHandler(getApplicationContext()));

Logcat输出:

05-29 16:19:38.351: E/AndroidRuntime(767): FATAL EXCEPTION: main
05-29 16:19:38.351: E/AndroidRuntime(767): java.lang.IllegalStateException: Could not execute method of the activity
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.view.View$1.onClick(View.java:3599)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.view.View.performClick(View.java:4204)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.view.View$PerformClick.run(View.java:17355)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.os.Handler.handleCallback(Handler.java:725)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.os.Handler.dispatchMessage(Handler.java:92)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.os.Looper.loop(Looper.java:137)
05-29 16:19:38.351: E/AndroidRuntime(767):  at android.app.ActivityThread.main(ActivityThread.java:5041)
05-29 16:19:38.351: E/AndroidRuntime(767):  at java.lang.reflect.Method.invokeNative(Native Method)
05-29 16:19:38.351: E/AndroidRuntime(767):  at java.lang.reflect.Method.invoke(Method.java:511)
05-29 16:19:38.351: E/AndroidRuntime(767):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) …

如何从图像的顶部和底部删除多余的空格,请参见下面的屏幕截图:

<ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:contentDescription="@string/About"
        android:src="@drawable/menu" />

我正在编写一个应用程序,其中我正在显示来自Raw文件夹的MP3歌曲列表,并允许用户使用点击按钮播放歌曲,同样我希望允许用户将歌曲设置为铃声,一个用户点击了在列表按钮中,请参见下面的屏幕截图:

MP3歌曲列表:

在PlayActivity.java中显示所选歌曲:

PlayActivity:

                // Set as Ringtone
        btn5.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {                               
         Uri path = Uri.parse("android.resource://com.applenty/raw/");
         RingtoneManager.setActualDefaultRingtoneUri(
         getApplicationContext(), RingtoneManager.TYPE_RINGTONE, path);
         Log .i("Ringtone", "Ringtone Set to Resource:: "+ path.toString());
         RingtoneManager.getRingtone(getApplicationContext(), path).play();

            }
        });

logcat的:

07-10 12:06:05.569: D/dalvikvm(958): GC_FOR_ALLOC freed 37K, 7% free 2486K/2648K, paused 130ms, total 147ms
07-10 12:06:05.630: I/dalvikvm-heap(958): Grow heap (frag case) to 3.153MB for 635812-byte allocation
07-10 12:06:05.719: D/dalvikvm(958): GC_FOR_ALLOC freed 1K, 6% free 3105K/3272K, paused 90ms, total 90ms
07-10 12:06:05.869: D/dalvikvm(958): GC_CONCURRENT freed …