{
Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(),
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
//在surfaceView上不停的绘图
doDraw(1, canvas);
File file = new File(mScreenshotPath + "/"
+ System.currentTimeMillis() + ".jpg");
FileOutputStream fos;
try
{
fos = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
}
catch (FileNotFoundException e)
{
Log.e("Panel", "FileNotFoundException", e);
}
catch (IOException e)
{
Log.e("Panel", "IOEception", e);
}
}
}
/**
* Helper method to ensure that the given path exists. TODO: check external
* storage state
*/
private boolean ensureSDCardAccess()
{
File file = new File(mScreenshotPath);
if (file.exists())
{
return true;
}
else if (file.mkdirs())
{
return true;
}
return false;
}
}
ScreenshotActivity.java
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
public class ScreenshotActivity extends Activity {
private Panel mPanel;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
mPanel = new Panel(this);
setContentView(mPanel);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.screenshot:
mPanel.saveScreenshot();
break;
}
return true;
}
}
ViewThread.java
import android.graphics.Canvas;
import android.view.SurfaceHolder;
public class ViewThread extends Thread {
private Panel mPanel;
private SurfaceHolder mHolder;
private boolean mRun = false;
private long mStartTime;
private long mElapsed;
public ViewThread(Panel panel) {
mPanel = panel;
mHolder = mPanel.getHolder();
}
public void setRunning(boolean run) {
mRun = run;
}
@Override
public void run() {
Canvas canvas = null;
mStartTime = System.currentTimeMillis();
while (mRun) {
canvas = mHolder.lockCanvas();
if (canvas != null) {
mPanel.doDraw(mElapsed, canvas);
mElapsed = System.currentTimeMillis() - mStartTime;
mHolder.unlockCanvasAndPost(canvas);
}
mStartTime = System.currentTimeMillis();
}
}
}
其实这很好理解。由于我的代码写在整个项目中，跌出来比较麻烦，就贴了一个以可以完整通过的工程。
下载地址：
下载在Linux公社的1号FTP服务器里，下载地址：
密码：www.muu.cc
在 2012年LinuxIDC.com\7月\Android中截图（surfaceView）源码
下载方法见 http://www.linuxidc.net/thread-1187-1-1.html
关于截屏，暂时我的需求已经满足了，不知道这符合其他情况么？欢迎有兴趣的人一起交流。