我一直在研究如何在android中以编程方式截取屏幕截图,但是当它截屏时,我得到一个工具栏和黑屏,而不是屏幕上实际显示的内容。
我还尝试对我为谷歌地图创建的自定义 InfoWindow 布局中的特定 TextView 进行屏幕截图。但这会在下面的第二行创建一个空指针异常。
TextView v1 = (TextView)findViewById(R.id.tv_code);
v1.setDrawingCacheEnabled(true);
无论如何,是否可以在不安装 android 屏幕截图库的情况下实际屏幕截图屏幕上的内容,或者在自定义 InfoWindow 布局中屏幕截图 TextView
这是我的截图方法:
/**
* Method to take a screenshot programmatically
*/
private void takeScreenshot(){
try {
//TextView I could screenshot instead of the whole screen:
//TextView v1 = (TextView)findViewById(R.id.tv_code);
View v1 = getWindow().getDecorView().getRootView();
v1.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + "test.jpg");
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.flush();
fo.close();
MediaStore.Images.Media.insertImage(getContentResolver(), f.getAbsolutePath(), f.getName(), f.getName());
Log.d("debug", "Screenshot saved to gallery");
Toast.makeText(HuntActivity.this,"Code Saved!",Toast.LENGTH_LONG).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
编辑:我已将方法更改为源提供的方法
如何以编程方式拍摄/合并 Google 地图 v2 的屏幕截图和 xml 布局? https://stackoverflow.com/questions/18309625/how-can-i-take-merge-screen-shot-of-google-map-v2-and-layout-of-xml-both-program
但是它不会截图任何内容。
public void captureMapScreen() {
GoogleMap.SnapshotReadyCallback callback = new GoogleMap.SnapshotReadyCallback() {
@Override
public void onSnapshotReady(Bitmap snapshot) {
try {
View mView = getWindow().getDecorView().getRootView();
mView.setDrawingCacheEnabled(true);
Bitmap backBitmap = mView.getDrawingCache();
Bitmap bmOverlay = Bitmap.createBitmap(
backBitmap.getWidth(), backBitmap.getHeight(),
backBitmap.getConfig());
Canvas canvas = new Canvas(bmOverlay);
canvas.drawBitmap(backBitmap, 0, 0, null);
canvas.drawBitmap(snapshot, new Matrix(), null);
FileOutputStream out = new FileOutputStream(
Environment.getExternalStorageDirectory()
+ "/"
+ System.currentTimeMillis() + ".jpg");
bmOverlay.compress(Bitmap.CompressFormat.JPEG, 90, out);
} catch (Exception e) {
e.printStackTrace();
}
}
};
mMap.snapshot(callback);
}