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

科特林

    private fun screenShot() {
          try {
            val mPath: String = this.getExternalFilesDir(null).getAbsolutePath()
              .toString() + "/temp" + ".png" 
            // create bitmap screenshot
            val v1: View = getWindow().getDecorView().getRootView()
            v1.isDrawingCacheEnabled = true
            val bitmap = Bitmap.createBitmap(v1.drawingCache)
            v1.isDrawingCacheEnabled = false
            val imageFile = File(mPath)
            val outputStream = FileOutputStream(imageFile)
            val quality = 100
            bitmap.compress(Bitmap.CompressFormat.PNG, quality, outputStream)
            outputStream.flush()
            outputStream.close()
        
            //or you can share to test the method fast
            val uriPath =
              FileProvider.getUriForFile(this, getPackageName() + ".sharing.provider", imageFile)
            val intent = Intent(Intent.ACTION_SEND)
            intent.type = "image/*"
            intent.clipData = ClipData.newRawUri("", uriPath)
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
            intent.putExtra(Intent.EXTRA_STREAM, uriPath)
            startActivity(Intent.createChooser(intent, "Sharing to..."))
          } catch (e: Throwable) {
            e.printStackTrace()
          }
        }

Java

  private void screenShot() {
    try {
      String mPath = this.getExternalFilesDir(null).getAbsolutePath().toString() + "/temp" + ".png";
      // create bitmap screenshot
      View v1 = getWindow().getDecorView().getRootView();
      v1.setDrawingCacheEnabled(true);
      Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
      v1.setDrawingCacheEnabled(false);

      File imageFile = new File(mPath);
      FileOutputStream outputStream = new FileOutputStream(imageFile);
      int quality = 100;
      bitmap.compress(Bitmap.CompressFormat.PNG, quality, outputStream);
      outputStream.flush();
      outputStream.close();

      //or you can share to test the method fast

      Uri uriPath = FileProvider.getUriForFile(this, getPackageName() + ".sharing.provider", imageFile);
      Intent intent = new Intent(Intent.ACTION_SEND);
      intent.setType("image/*");
      intent.setClipData(ClipData.newRawUri("", uriPath));
      intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
      intent.putExtra(Intent.EXTRA_STREAM, uriPath);
      startActivity(Intent.createChooser(intent, "Sharing to..."));

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

其他回答

在android中截取视图的截图。

public static Bitmap getViewBitmap(View v) {
    v.clearFocus();
    v.setPressed(false);

    boolean willNotCache = v.willNotCacheDrawing();
    v.setWillNotCacheDrawing(false);

    int color = v.getDrawingCacheBackgroundColor();
    v.setDrawingCacheBackgroundColor(0);

    if (color != 0) {
        v.destroyDrawingCache();
    }
    v.buildDrawingCache();
    Bitmap cacheBitmap = v.getDrawingCache();
    if (cacheBitmap == null) {
        return null;
    }

    Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);

    v.destroyDrawingCache();
    v.setWillNotCacheDrawing(willNotCache);
    v.setDrawingCacheBackgroundColor(color);

    return bitmap;
}
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);

这个方法不需要root权限,也不需要大量编码。


在adb shell上使用以下命令可以截屏。

input keyevent 120

这个命令不需要任何root权限,所以你也可以从android应用程序的java代码执行。

Process process;
process = Runtime.getRuntime().exec("input keyevent 120");

更多关于android中的keyevent代码,请参阅http://developer.android.com/reference/android/view/KeyEvent.html

这里我们用了。KEYCODE_SYSRQ,它的值是120,用于系统请求/打印屏幕键。


如CJBS所说,输出的图片将保存在/sdcard/Pictures/Screenshots

这个问题的大多数答案使用Canvas绘图方法或绘图缓存方法。然而,View.setDrawingCache()方法在API 28中已弃用。目前,用于制作截图的推荐API是API 24提供的PixelCopy类(但接受Window参数的方法可从API 26 == Android 8.0 Oreo获得)。下面是一个检索位图的示例Kotlin代码:

@RequiresApi(Build.VERSION_CODES.O)
fun saveScreenshot(view: View) {
    val window = (view.context as Activity).window
    if (window != null) {
        val bitmap = Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
        val locationOfViewInWindow = IntArray(2)
        view.getLocationInWindow(locationOfViewInWindow)
        try {
            PixelCopy.request(window, Rect(locationOfViewInWindow[0], locationOfViewInWindow[1], locationOfViewInWindow[0] + view.width, locationOfViewInWindow[1] + view.height), bitmap, { copyResult ->
                if (copyResult == PixelCopy.SUCCESS) {
                    saveBitmap(bitmap)
                }
                // possible to handle other result codes ...
            }, Handler())
        } catch (e: IllegalArgumentException) {
            // PixelCopy may throw IllegalArgumentException, make sure to handle it
        }
    }
}

我的解决方案是:

public static Bitmap loadBitmapFromView(Context context, View v) {
    DisplayMetrics dm = context.getResources().getDisplayMetrics(); 
    v.measure(MeasureSpec.makeMeasureSpec(dm.widthPixels, MeasureSpec.EXACTLY),
            MeasureSpec.makeMeasureSpec(dm.heightPixels, MeasureSpec.EXACTLY));
    v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    Bitmap returnedBitmap = Bitmap.createBitmap(v.getMeasuredWidth(),
            v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(returnedBitmap);
    v.draw(c);

    return returnedBitmap;
}

and

public void takeScreen() {
    Bitmap bitmap = ImageUtils.loadBitmapFromView(this, view); //get Bitmap from the view
    String mPath = Environment.getExternalStorageDirectory() + File.separator + "screen_" + System.currentTimeMillis() + ".jpeg";
    File imageFile = new File(mPath);
    OutputStream fout = null;
    try {
        fout = new FileOutputStream(imageFile);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fout);
        fout.flush();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        fout.close();
    }
}

图像保存在外部存储文件夹中。