Android多个ImageView触摸移动

Question

下面是我的xml文件.它的名字是main.xml

---

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">
    <ImageView android:id="@+id/imageView" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:src="@drawable/icon"
        android:scaleType="matrix">
    </ImageView>
    <ImageView android:id="@+id/imageView1" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:src="@drawable/bg_sound"
        android:scaleType="matrix"></ImageView>
</FrameLayout>

---

我的Java文件在下面

---

import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.FloatMath;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

public class Test1Activity extends Activity implements OnTouchListener {
    private static final String TAG = "Touch";
    // These matrices will be used to move and zoom image
    Matrix matrix = new Matrix();
    Matrix savedMatrix = new Matrix();

    // We can be in one of these 3 states

    // Remember some things for zooming
    PointF start = new PointF();
    PointF mid = new PointF();
    float oldDist = 1f;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ImageView view = (ImageView) findViewById(R.id.imageView);
        view.setOnTouchListener(this);

        ImageView view1 = (ImageView) findViewById(R.id.imageView1);
        view1.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        ImageView view = (ImageView) v;
        // Dump touch event to log

        // Handle touch events here...
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            savedMatrix.set(matrix);
            start.set(event.getX(), event.getY());
            break;
        case MotionEvent.ACTION_UP:
            savedMatrix.set(matrix);
            //matrix.postRotate(90);

            break;
        case MotionEvent.ACTION_MOVE:
                // ...
                matrix.set(savedMatrix);
                matrix.postTranslate(event.getX() - start.x, event.getY()
                        - start.y);
            break;
        }

        view.setImageMatrix(matrix);
        view.invalidate();
        return true; // indicate event was handled
    }

}

---

我能够实现触摸移动,但因为有2个图像视图添加,只有最新添加的图像视图是可移动的.

我猜问题是layout_width="fill_parent"导致只有触摸时识别前视图.如果我使用的layout_width="wrap_content"是imageview,则仅在该图像大小的区域中移动并且不可见.

如何解决这个问题？

谢谢,

Answer 1

只有一个视图进程onTouch操作。所以有几个选择：

1）返回“ false” - 它可能对你有帮助

2）使用“ wrap_content”而不使用ImageMatrix。移动图像的左上角