Question

我正在开发一个应用程序，我必须在其中截取应用程序屏幕的屏幕截图现在我使用下面的代码它不起作用。我是null位图图像

Process sh = Runtime.getRuntime().exec("su", null,null);
OutputStream  os = sh.getOutputStream();
os.write(("/system/bin/screencap -p " + "/sdcard/"+ "bs_score_img" +".png").getBytes("ASCII"));
os.flush();
os.close();
sh.waitFor();

String screenShot =  Environment.getExternalStorageDirectory().toString()+"/bs_score_img.png";
Log.i("TAG:Score: screenShot path=", screenShot);
Bitmap bmp = BitmapFactory.decodeFile(new File(screenShot).getAbsolutePath());

Answer 1

试试这个：

Process sh = Runtime.getRuntime().exec("su", null,null);

                    OutputStream  os = sh.getOutputStream();
                    os.write(("/system/bin/screencap -p " + "/sdcard/img.png").getBytes("ASCII"));
                    os.flush();

                    os.close();
                    sh.waitFor();

then read img.png as bitmap and convert it jpg as follows 

Bitmap screen = BitmapFactory.decodeFile(Environment.getExternalStorageDirectory()+         
File.separator +"img.png");

//my code for saving
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    screen.compress(Bitmap.CompressFormat.JPEG, 15, bytes);

//you can create a new file name "test.jpg" in sdcard folder.

File f = new File(Environment.getExternalStorageDirectory()+ File.separator + "test.jpg");
            f.createNewFile();
//write the bytes in file
    FileOutputStream fo = new FileOutputStream(f);
    fo.write(bytes.toByteArray());
// remember close de FileOutput

    fo.close();

谷歌有一个图书馆，你可以用它来截取而不需要生根，我试过了，但我确信它会尽快消耗内存。

尝试http://code.google.com/p/android-screenshot-library/

或试试这个：

View v1 = L1.getRootView();
                    v1.setDrawingCacheEnabled(true);
                    Bitmap bm = v1.getDrawingCache();
                    BitmapDrawable bitmapDrawable = new BitmapDrawable(bm);
                    image = (ImageView) findViewById(R.id.screenshots);
                    image.setBackgroundDrawable(bitmapDrawable);

Answer 2

我从另一个post找到了这段代码：

// image naming and path  to include sd card  appending name you choose for file
String mPath = Environment.getExternalStorageDirectory().toString() + "/" + ACCUWX.IMAGE_APPEND;   

// create bitmap screen capture
Bitmap bitmap;
View v1 = mCurrentUrlMask.getRootView();
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);

OutputStream fout = null;
imageFile = new File(mPath);

try {
    fout = new FileOutputStream(imageFile);
    bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fout);
    fout.flush();
    fout.close();

} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

Answer 3

我们说你点击了按钮

findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
       Bitmap bitmap = takeScreenshot();
       saveBitmap(bitmap);
   }
});

之后你需要这两种方法

public Bitmap takeScreenshot() {
   View rootView = findViewById(android.R.id.content).getRootView();
   rootView.setDrawingCacheEnabled(true);
   return rootView.getDrawingCache();
}

 public void saveBitmap(Bitmap bitmap) {
    File imagePath = new File(Environment.getExternalStorageDirectory() + "/screenshot.png");
    FileOutputStream fos;
    try {
        fos = new FileOutputStream(imagePath);
        bitmap.compress(CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
    } catch (FileNotFoundException e) {
        Log.e("GREC", e.getMessage(), e);
    } catch (IOException e) {
        Log.e("GREC", e.getMessage(), e);
    }
}

Answer 4

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;
}

只需使用您想要快照的视图调用此方法..所以如果您希望整个屏幕只传入最顶层的ViewGroup。如果你想要系统控件也只需要调用：

Answer 5

你可以试试这个

   private Bitmap getScreen(){    
    mDecorView = getWindow().getDecorView();
    runOnUiThread(new Runnable() {
    public void run() {
    mDecorView.invalidate();
    mDecorView.post(this);
    }
    });
    View v1 = mDecorView.getRootView();
    System.out.println("Root View : "+v1);
    v1.setDrawingCacheEnabled(true);
    return v1.getDrawingCache();
 }

此处mDecorView是View。

Answer 6

此处您可以捕获屏幕并将其保存在存储空间

授予在外部存储中创建文件的权限

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

这是活动代码。

private void takeScreenshot() {
Date now = new Date();
android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

try {
    // image naming and path  to include sd card  appending name you choose for file
    String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

    // create bitmap screen capture
    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.JPEG, quality, outputStream);
    outputStream.flush();
    outputStream.close();

    openScreenshot(imageFile);
} catch (Throwable e) {
    // Several error may come out with file handling or OOM
    e.printStackTrace();
}
}

这是捕捉屏幕的方法。

如何在Android中拍摄应用程序屏幕的屏幕截图？

6 个答案: