如何通过代码而不是程序来截取手机屏幕的选定区域的截图?
当前回答
从Android 11 (API级别30),你可以用辅助服务截屏:
takeScreenshot -截取指定显示的屏幕截图,并通过AccessibilityService.ScreenshotResult返回。
其他回答
如果你想从片段中截取截图,请遵循以下步骤:
Override onCreateView(): @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_one, container, false); mView = view; } Logic for taking screenshot: button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { View view = mView.findViewById(R.id.scrollView1); shareScreenShotM(view, (NestedScrollView) view); } method shareScreenShotM)(): public void shareScreenShotM(View view, NestedScrollView scrollView){ bm = takeScreenShot(view,scrollView); //method to take screenshot File file = savePic(bm); // method to save screenshot in phone. } method takeScreenShot(): public Bitmap takeScreenShot(View u, NestedScrollView z){ u.setDrawingCacheEnabled(true); int totalHeight = z.getChildAt(0).getHeight(); int totalWidth = z.getChildAt(0).getWidth(); Log.d("yoheight",""+ totalHeight); Log.d("yowidth",""+ totalWidth); u.layout(0, 0, totalWidth, totalHeight); u.buildDrawingCache(); Bitmap b = Bitmap.createBitmap(u.getDrawingCache()); u.setDrawingCacheEnabled(false); u.destroyDrawingCache(); return b; } method savePic(): public static File savePic(Bitmap bm){ ByteArrayOutputStream bytes = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.JPEG, 100, bytes); File sdCardDirectory = new File(Environment.getExternalStorageDirectory() + "/Foldername"); if (!sdCardDirectory.exists()) { sdCardDirectory.mkdirs(); } // File file = new File(dir, fileName); try { file = new File(sdCardDirectory, Calendar.getInstance() .getTimeInMillis() + ".jpg"); file.createNewFile(); new FileOutputStream(file).write(bytes.toByteArray()); Log.d("Fabsolute", "File Saved::--->" + file.getAbsolutePath()); Log.d("Sabsolute", "File Saved::--->" + sdCardDirectory.getAbsolutePath()); } catch (IOException e) { e.printStackTrace(); } return file; }
对于activity,您可以简单地使用View v1 = getWindow().getDecorView().getRootView();而不是mView
调用这个方法,传入你想要屏幕截图的最外层ViewGroup:
public Bitmap screenShot(View view) {
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
view.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
return bitmap;
}
对于那些想要捕获GLSurfaceView的人,getDrawingCache或绘制到画布方法将不起作用。
在帧呈现之后,您必须读取OpenGL帧缓冲区的内容。这里有一个很好的答案
您可以尝试以下库: http://code.google.com/p/android-screenshot-library/ Android截图库(ASL)允许以编程方式从Android设备捕获屏幕截图,而不需要具有root访问权限。相反,ASL利用了在后台运行的本地服务,每次设备启动时通过Android调试桥(ADB)启动。
private void captureScreen() {
View v = getWindow().getDecorView().getRootView();
v.setDrawingCacheEnabled(true);
Bitmap bmp = Bitmap.createBitmap(v.getDrawingCache());
v.setDrawingCacheEnabled(false);
try {
FileOutputStream fos = new FileOutputStream(new File(Environment
.getExternalStorageDirectory().toString(), "SCREEN"
+ System.currentTimeMillis() + ".png"));
bmp.compress(CompressFormat.PNG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
在清单中添加权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
对于支持棉花糖或以上版本,请在onCreate方法中添加以下代码
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},00);
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