android截屏代码

private Button m_btn;
private MainActivity m_thisActv;

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

m_thisActv = this;

m_btn = (Button)findViewById(R.id.button1);
m_btn.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub

String fname = "mnt/sdcard/hello.png";

View view = m_thisActv.getWindow().getDecorView();

view.setDrawingCacheEnabled(true);

view.buildDrawingCache();

Bitmap bitmap = view.getDrawingCache();

if (bitmap != null)
{

m_logTextString+="bitmap got!\n";
m_texView.setText(m_logTextString);
try
{
FileOutputStream out = new FileOutputStream(fname);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);

}
catch(Exception e)
{
e.printStackTrace();
}

}
else
{
Log.d("myLog","bitmap == null");

}

}

});
}

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />