android - 从 android 中的 GestureOverlayView 清除手势

Question

我正在使用 GestureOverlayView 绘制我已经成功实现的任何图片，但是当我想绘制另一张图片时，我需要从我的 Activity 中的 GestureOverlayView 中清除之前的图片。我该怎么做？

请查看我的代码:

public class MainActivity extends Activity {

    private Button button_save;
    private Button button_clear;
    private GestureOverlayView gesture;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        gesture = (GestureOverlayView) findViewById(R.id.gestures);
        button_save = (Button) findViewById(R.id.save_button);
        button_clear = (Button) findViewById(R.id.clearbtn);
        button_save.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                try {
                    Bitmap gestureImg = gesture.getGesture().toBitmap(100, 100,
                            8, Color.BLACK);

                    ByteArrayOutputStream bos = new ByteArrayOutputStream();
                    gestureImg.compress(Bitmap.CompressFormat.PNG, 100, bos);
                    byte[] bArray = bos.toByteArray();

                    Intent intent = new Intent(MainActivity.this,
                            Activity2.class);

                    intent.putExtra("draw", bArray);
                    startActivity(intent);

                } catch (Exception e) {
                    e.printStackTrace();
                    Toast.makeText(MainActivity.this, "No draw on the string",
                            3000).show();
                }
            }
        });

        button_clear.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                **//What to do here to clear my drawn animation**

            }
        });
    }

Answer 1

这两行将从您的 Activity 中清除创建的手势

gesture.cancelClearAnimation();
gesture.clear(true);