第一篇文章

很坚决

package com.kale.imageview02;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {
ImageView iV01,iV02;
TextView tV;

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

viewInit();


}

public void viewInit() {
iV01 = (ImageView)findViewById(R.id.imageView01_id);
iV02 = (ImageView)findViewById(R.id.imageView02_id);
tV = (TextView)findViewById(R.id.textView01_id);

iV01.setOnTouchListener(new OnTouchListener() {

@Override
public boolean onTouch(View arg0, MotionEvent event) {

if(event.getAction() == MotionEvent.ACTION_MOVE) {
tV.setText("x坐標 = "+event.getX()+" y坐標 = "+event.getY());

}
if(event.getAction() == MotionEvent.ACTION_DOWN) {
//得到圖片01的bitmapDrawable對象
BitmapDrawable bitmapDrawable = (BitmapDrawable)iV01.getDrawable();
//獲取到位圖
Bitmap bitmap = bitmapDrawable.getBitmap();
//定義縮放比例
double scale = bitmap.getWidth()/320.0;
//定義繪製的開始坐標
int x = (int)(event.getX() * scale);
int y = (int)(event.getY() * scale);

if(x + 120 > bitmap.getWidth()) {
x = bitmap.getWidth() - 120;
}
if(y + 120 >bitmap.getHeight()){
y = bitmap.getHeight() - 120;
}
//顯示圖片的指定區域
iV02.setImageBitmap(Bitmap.createBitmap(bitmap,x,y,120,120));
}
//如果設置為false，那麼移動坐標就不會顯示
return true;
}
});
}
}

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第一篇文章

原文：http://www.cnblogs.com/tianzhijiexian/p/3849729.html