public class PrintScreenActivity extends Activity {
/** Called when the activity is first created. */
private static final String TAG = PrintScreenActivity.class.getName();
private Button btnShort;
ImageView image = null;
public static String SCREEN_SHOTS_LOCATION = Environment.getExternalStorageDirectory().getPath();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
image = (ImageView)findViewById(R.id.image);
btnShort = (Button) findViewById(R.id.btnShots);
btnShort.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
try {
takeScreenShot(getWindow().peekDecorView(),SCREEN_SHOTS_LOCATION);
} catch (Exception e) {
// TODO Auto-generated catch block
Log.e("tag",TAG);
}
}
});
}
public void takeScreenShot(View view) throws Exception {
takeScreenShot(view, "default");
}
public void takeScreenShot(View view, String name) throws Exception {
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
Canvas canvas = new Canvas(bitmap);
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Paint paint = new Paint();
paint.setColor(Color.YELLOW);
SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String time = simple.format(new Date());
canvas.drawText(time, w-w/2, h-h/10, paint);
canvas.save();
canvas.restore();
FileOutputStream fos = null;
try {
File sddir = new File(SCREEN_SHOTS_LOCATION);
if (!sddir.exists()) {
sddir.mkdirs();
}
image.setImageBitmap(bitmap);
File file = new File(SCREEN_SHOTS_LOCATION +File.separator+"screen" + ".png");
fos = new FileOutputStream(file);
if (fos != null) {
bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();
}
} catch (Exception e) {
Log.e("tag",e.getCause().toString());
e.printStackTrace();
}
}
}
view.buildDrawingCache()有时不一定起作用，因为如果有硬件加速的话，drawingcache是失效的，所以也可以这样
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bitmap);
view.dispatchDraw(c);