Question

最重要的是，我有一个自定义相机类，预览效果很好，只需轻轻一点就可以点击ClickListener。但是，我需要屏幕上的按钮来选择闪光灯选项和更换相机等等，而且它们显然会有自己的自定义图像。现在这看起来应该很简单，但无论我做什么，我似乎无法让按钮出现在我的预览中。这是相机和xml。公共类TakePictureActivity扩展Activity { 私人预览mCameraView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

    mCameraView = new Preview(this);
    setContentView(mCameraView);
}

class Preview extends SurfaceView implements SurfaceHolder.Callback, Camera.PictureCallback {
    private SurfaceHolder mHolder;
    private Camera mCamera;
    private RawCallback mRawCallback;


    public Preview(Context context){
        super(context);

        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mRawCallback = new RawCallback();
/*
        setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mCamera.takePicture(mRawCallback, mRawCallback, null, Preview.this);
            }
        });
*/
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        Camera.Parameters parameters = mCamera.getParameters();
        parameters.setPreviewSize(width, height);
        mCamera.setParameters(parameters);

        mCamera.startPreview();
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        mCamera = Camera.open();

        configure(mCamera);

        try{
            mCamera.setPreviewDisplay(holder);
        }catch(IOException e){
            closeCamera();
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        closeCamera();
    }

    private void configure(Camera camera){
        Camera.Parameters parameters = camera.getParameters();

        List<Integer> formats = parameters.getSupportedPictureFormats();
        if(formats.contains(PixelFormat.RGB_565))
            parameters.setPictureFormat((PixelFormat.RGB_565));
        else
            parameters.setPictureFormat(PixelFormat.JPEG);

        List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
        Camera.Size size = sizes.get(sizes.size() - 1);
        parameters.setPreviewSize(size.width, size.height);

        List<String> flashModes = parameters.getSupportedFlashModes();
        if(flashModes.size() > 1)
            parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);

        List<String> sceneModes = parameters.getSupportedSceneModes();
        if(sceneModes.contains(Camera.Parameters.SCENE_MODE_ACTION))
            parameters.setSceneMode(Camera.Parameters.SCENE_MODE_ACTION);
        else
            parameters.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);

        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_FIXED);

        if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
            camera.setDisplayOrientation(90);
        else if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
            camera.setDisplayOrientation(180);

        camera.setParameters(parameters);
    }

    private void closeCamera(){
        if(mCamera != null){
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {
        mCamera.startPreview();


    }

简单地为ImageButton实例化onClickListener也会崩溃我的应用程序。哈哈，我只是想让它显示出来。一步一步。

谢谢！

修改

这是我的XML

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".TakePictureActivity">

<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/imageView"

    />

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imageButton4"
    android:layout_gravity="center_horizontal|bottom"
    android:src="@drawable/ic_menu_camera"/>

没有显示自定义相机预览的按钮

0 个答案: