2011年5月8日星期日

通過繪圖緩存(DrawingCache)捕獲屏幕顯示

當點擊按鈕, 本應用程序會通過繪圖緩存(DrawingCache)捕獲屏幕顯示, 與顯示在圖像視圖中.

通過繪圖緩存(DrawingCache)捕獲屏幕顯示

package com.AndroidScreenCapture;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class AndroidScreenCapture extends Activity {

View myscreen;
ImageView viewScreen;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
setContentView(R.layout.main);
myscreen = (View)findViewById(R.id.myscreen);
Button buttonCapture = (Button)findViewById(R.id.capture);
viewScreen = (ImageView)findViewById(R.id.screenview);

buttonCapture.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
myscreen.setDrawingCacheEnabled(true);
Bitmap bmScreen = myscreen.getDrawingCache();
viewScreen.setImageBitmap(bmScreen);
}});
}
}


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/myscreen"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/capture"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Capture Screen!"
/>
<ImageView
android:id="@+id/screenview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>


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