Question

我试图以明确的意图传递屏幕截图，但屏幕显示黑色截图（请参阅图像here）。一旦我点击分享，就会出现一个吐司说发送失败。这是捕获屏幕截图并将其发送到其他应用程序的代码：

public void getScreenShot(View view) {
        View screenView = view.getRootView();
        screenView.setDrawingCacheEnabled(true);
        Bitmap bitmap = Bitmap.createBitmap(screenView.getDrawingCache());
        screenView.setDrawingCacheEnabled(false);
        f = new File(this.getFilesDir(), "screenshotFile");
        try {
            if (!f.exists())
                f.createNewFile();
        } catch (IOexception e) {
            e.printStackTrace();
        }
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 10, bos);
        byte[] bitmapdata = bos.toByteArray();

        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(f);
            fos.write(bitmapdata);
            fos.flush();
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

此代码将数据发送到whatsapp：

public void shareWhatsapp(View view) {
    try {
        myVib.vibrate(50);
        getScreenShot(view);

        //String fileName = "screenshotFile";
        //Bitmap bitmap = BitmapFactory.decodeFile(f.getAbsolutePath());

        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("image/*");
        try {
            intent.setPackage("com.whatsapp");
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(MainActivity.this, "App not installed", Toast.LENGTH_SHORT).show();
        }
        //TODO: APP CAN CRASH HERE
        if (position > 0) {
            try {
                intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(f);
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                intent.putExtra(Intent.EXTRA_TEXT, Titles.get(position - 1) + ": " + Links.get(position - 1));       //position problems
            }
        } else {
            try {
                intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(f);
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                intent.putExtra(Intent.EXTRA_TEXT, Titles.get(0) + ": " + Links.get(0));       //position problems
            }
        }
        startActivity(intent);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

有人可以帮我这个吗？

Answer 1

首先，您要将文件写入internal storage。第三方应用无法访问您应用的内部存储空间。

其次，您使用的是`public void switchFragment(){ FragmentManager fm = getActivity().getFragmentManager(); fragmentB= (FragmentB) fm.findFragmentById(R.id.fragmentB); if (fragmentB == null) { fragmentB = FragmentB.newInstance("My Fragment B"); fm.beginTransaction(). replace(R.id.fragmentA, fragmentB).commit(); } }`，starting to be discontinued。

您最安全的长期行动方针是have a ContentProvider serve your file from its location on internal storage，然后使用与Uri.fromFile()相关联的Uri。

图像未作为意图额外传递时显示

1 个答案: