Question

我使用CameraPreview作为Acitivity的背景，它还应该包含一些像Button和ImageView这样的元素。按钮单击使动画在ImageView内部启动。我设法添加并显示Button，但如果我添加ImageView应用程序崩溃。请帮忙。

布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".MainActivity" >

<FrameLayout
    android:id="@+id/camera_preview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

<Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentBottom="true"
        android:layout_marginLeft="30dp"
        android:background="@drawable/playselector" />

<ImageView
    android:id="@+id/image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:background="@android:color/transparent"
    android:src="@drawable/anim" />

</RelativeLayout>

MainActivity.java：

public class MainActivity extends Activity  {

 private Camera mCamera;
    private CameraPreview mPreview;
    AnimationDrawable mAnim;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mCamera = getCameraInstance();

        mPreview = new CameraPreview(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
        preview.addView(mPreview);

        /* ImageView image = (ImageView)findViewById(R.id.image);
        image.setImageResource(R.anim.blanim);
        mAnim = (AnimationDrawable)image.getBackground(); */ this part make app crash


       Button button1 = (Button) this.findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {                   
                mAnim.start();
        }

        }); 
    }

    public static Camera getCameraInstance(){
        Camera c = null;
        try {
            c = Camera.open(); 
        }
        catch (Exception e){

        }
        return c; 
    }
}

Answer 1

而不是使用image.setImageResource(R.anim.blanim);使用image.setBackgroundResource(R.anim.blanim);获取更多信息，请查看here。

覆盖动画camerapreview

1 个答案: