Android图片的拖拽与缩放，移动端混合开发技术

import android.graphics.PointF;

import android.os.Bundle;

import android.util.FloatMath;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.widget.ImageView;

/**

• 对图片进行拖拽和缩放

• @author wwj

*/

public class MainActivity extends Activity {

private ImageView imageView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

imageView = (ImageView) findViewById(R.id.imageView);

imageView.setOnTouchListener(new TouchListener());

}

private class TouchListener implements OnTouchListener {

private PointF startPoint = new PointF();

private Matrix matrix = new Matrix();

private Matr