Question

首先，我正在编写一个根应用程序，因此root权限没有问题。我搜索过并搜索过，发现很多代码对我来说从来没有用过，这是我到目前为止拼凑起来的东西。当我说sorta我的意思是它在我的/sdcard/test.png上生成一个图像但是文件是0字节，显然无法查看。

public class ScreenShot extends Activity{

View content;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.blank);
    content = findViewById(R.id.blankview);
    getScreen();
}

private void getScreen(){
    Bitmap bitmap = content.getDrawingCache();
    File file = new File("/sdcard/test.png");
    try 
    {
        file.createNewFile();
        FileOutputStream ostream = new FileOutputStream(file);
        bitmap.compress(CompressFormat.PNG, 100, ostream);
        ostream.close();
    } 
    catch (Exception e) 
    {
        e.printStackTrace();
    }
}
}

如何通过代码在android中拍摄屏幕截图的任何帮助将非常感谢谢谢！

=== EDIT ===

以下是我正在使用的所有图像都是在我的SD卡上制作的，不再是0字节，但整个事物都是黑色的，上面没有任何内容。我已将活动绑定到我的搜索按钮，所以当我在手机上的某个地方时，我长按搜索，它应该拍摄屏幕截图但我只是得到一个黑色图像？一切都设置透明，所以我认为它应该抓住屏幕上的任何东西，但我只是不断变黑

清单

<activity android:name=".extras.ScreenShot"
    android:theme="@android:style/Theme.Translucent.NoTitleBar"
    android:noHistory="true" >
    <intent-filter>
        <action android:name="android.intent.action.SEARCH_LONG_PRESS" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
    </activity>

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#00000000"
  android:id="@+id/screenRoot">    
</LinearLayout>

屏幕截图类

public class ScreenShot extends Activity{

View content;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.screenshot);
    content = findViewById(R.id.screenRoot);
    ViewTreeObserver vto = content.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
      @Override
      public void onGlobalLayout() {
        content.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        getScreen();
      }
    });
}

private void getScreen(){
    View view = content;
    View v = view.getRootView();
    v.setDrawingCacheEnabled(true);
    Bitmap b = v.getDrawingCache();             
    String extr = Environment.getExternalStorageDirectory().toString();
    File myPath = new File(extr, "test.jpg");
    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(myPath);
        b.compress(Bitmap.CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
        MediaStore.Images.Media.insertImage(getContentResolver(), b, "Screen", "screen");
    }catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    finish();
}
}

Answer 1

你走了......我用过这个：

View v = view.getRootView();
v.setDrawingCacheEnabled(true);
Bitmap b = v.getDrawingCache();
String extr = Environment.getExternalStorageDirectory().toString();
File myPath = new File(extr, getString(R.string.free_tiket)+".jpg");
FileOutputStream fos = null;
try {
    fos = new FileOutputStream(myPath);
    b.compress(Bitmap.CompressFormat.JPEG, 100, fos);
    fos.flush();
    fos.close();
    MediaStore.Images.Media.insertImage( getContentResolver(), b, 
                                         "Screen", "screen");
} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

v iz root layout ...只是指向;）））

Answer 2

对于这个问题的下一位读者 -

通过将视图绘制到画布来实现此目的的非常简单的方法 -

将您的主要布局参考传递给此方法 -

 Bitmap file = save(layout);

 Bitmap save(View v)
   {
    Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    v.draw(c);
    return b;
   }

Answer 3

我认为你必须等到布局完全绘制完毕。使用ViewTreeObserver在完全绘制布局时回调...

在onCreate上添加此代码。只需从onGlobalLayout（）内部调用getScreen ..

ViewTreeObserver vto = content.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    content.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    getScreen();
  }
});

我曾经问过一个类似的question一次..请看我的问题解释了在android中截取屏幕截图的方法..希望这有帮助

Answer 4

public class MainActivity extends Activity
{
Button btn;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btn = (Button) findViewById(R.id.btn);
    btn.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            // TODO Auto-generated method stub
            Bitmap bitmap = takeScreenshot();
            saveBitmap(bitmap);

        }
    });
}

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);
    }
}
}

不要忘记给外部存储空间写入权限！

Answer 5

你拍这样的屏幕截图........

View view =  findViewById(R.id.rellayout);
        view.getRootView();
        String state = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(state)) 
        {
            File picDir  = new File(Environment.getExternalStorageDirectory()+ "/name");
            if (!picDir.exists())
            {
                picDir.mkdir();
            }
            view.setDrawingCacheEnabled(true);
            view.buildDrawingCache(true);
            Bitmap bitmap = view.getDrawingCache();
//          Date date = new Date();
            String fileName = "mylove" + ".jpg";
            File picFile = new File(picDir + "/" + fileName);
            try 
            {
                picFile.createNewFile();
                FileOutputStream picOut = new FileOutputStream(picFile);
                bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), (int)(bitmap.getHeight()/1.2));//Optional
                boolean saved = bitmap.compress(CompressFormat.JPEG, 100, picOut);
                if (saved) 
                {
                    Toast.makeText(getApplicationContext(), "Image saved to your device Pictures "+ "directory!", Toast.LENGTH_SHORT).show();
                } else 
                {
                    //Error
                }
                picOut.close();
            } 
            catch (Exception e) 
            {
                e.printStackTrace();
            }
            view.destroyDrawingCache();
        } else {


        }

Android以编程方式拍摄屏幕截图

5 个答案: