java - 用相机拍照但不保存为文件，仅显示

Question

在我的 Android 项目中，我想用相机拍照但不将其保存为文件，仅将其显示在 ImageView 上、可绘制或其他形式。

在我的项目中，我可以看到相机，如下面的代码。

我尝试了很多方法，但如果不保存SDCard，我就无法拍照。

ShowCamera.java

 public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {

    private SurfaceHolder holdMe;
    private Camera theCamera;

    public ShowCamera(Context context, Camera camera) {
        super(context);
        theCamera = camera;
        holdMe = getHolder();
        holdMe.addCallback(this);
    }

    @Override
    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            theCamera.setPreviewDisplay(holder);
            theCamera.startPreview();
        } catch (IOException e) {
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder arg0) {
    }
}

MainActivity.java

public class MainActivity extends Activity  {

       private Camera cameraObject;
       private ShowCamera showCamera;

       public static Camera isCameraAvailiable(){
          Camera object = null;
          try {
             object = Camera.open(); 
          }
          catch (Exception e){
          }
          return object; 
       }



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_index);

          cameraObject = isCameraAvailiable();
          showCamera = new ShowCamera(this, cameraObject);
          final FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
          preview.addView(showCamera);
    }

谢谢!

Answer 1

首先，不要忘记将其放入 AndroidManifest.xml 中:<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

因此，您可以按照以下示例操作:http://hmkcode.com/android-camera-taking-photos-camera/