Question

我正在片段中使用相机意图拍照。在某些设备上它可以完美运行，但在某些设备上，我的片段在拍照后会关闭。

这是我调用相机意图的代码：

Intent picIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
getActivity().startActivityForResult(picIntent, Constants.TAKE_PICTURE_SIGN_UP);

这是我的MainActivity onActivityResult：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == Constants.TAKE_PICTURE_SIGN_UP || requestCode == Constants.SELECT_PICTURE_SIGN_UP)
    {
        SignUpFragment frag = (SignUpFragment)getSupportFragmentManager().findFragmentByTag(Constants.SignUpFragmentTag);
        if(frag != null && frag.isVisible())
        {
            frag.onActivityResult(requestCode, resultCode, data);
        }
    }
}

当我从画廊中选择图片时它工作正常，但是当我从相机拍摄照片时，碎片为空。是什么导致这里的问题以及如何解决它？

Answer 1

我使用以下系列，它对我有用

Intent picIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp1.jpg");
Uri mImageCaptureUri = Uri.fromFile(f);

picIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
getActivity().startActivityForResult(picIntent, Constants.TAKE_PICTURE_SIGN_UP);

Answer 2

除了@Mina Azhar answer之外，当系统在低内存中杀死后台活动时你必须处理。

fragment.startActivityForResult(picIntent, Constants.TAKE_PICTURE_SIGN_UP);

您需要保存片段状态，

@Override
public void onSaveInstanceState(@NonNull Bundle outState) {
   outState.putParcelable("cameraMediaOutputUri", mImageCaptureUri);
  super.onSaveInstanceState(outState);
}

恢复片段状态 Fragment Life Cycle

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    if (savedInstanceState !=null && savedInstanceState.containsKey("cameraMediaOutputUri"))
        mImageCaptureUri = savedInstanceState.getParcelable("cameraMediaOutputUri");
}

Answer 3

使用这样的方法确保附加并显示您的片段：

private MyFragmentA switchToFragmentA(){

    FragmentManager fm = getSupportFragmentManager();
    MyFragmentA fragment = (MyFragmentA) fm.findFragmentByTag(TAG_A);

    if(fragment == null){
        fragment = MyFragmentA.newInstance();
    }

    fm.beginTransaction().replace(R.id.fragment_container, fragment, TAG_A).commit();

    return fragment;
}

然后像这样调整你的onActivityResult：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == Constants.TAKE_PICTURE_SIGN_UP || requestCode == Constants.SELECT_PICTURE_SIGN_UP){
        switchToFragmentA().onActivityResult(requestCode, resultCode, data);
    }
}

Answer 4

您致电：getActivity().startActivityForResult(intent,111);

你应该致电：startActivityForResult(intent,111);

也可以尝试

// In your activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    for (Fragment fragment : getSupportFragmentManager().getFragments()) {
        fragment.onActivityResult(requestCode, resultCode, data);
    }
}

Answer 5

问题：摄像机活动是否会破坏您的活动和碎片。现在正确的解决方案是实现所有片段和活动的onSaveInstanceState方法。

Last Resort快速解决方案：将活动设置为不会破坏方向更改和屏幕重新调整大小等。对于主活动的清单文件或具有该特定片段的活动添加这一行

<activity
        android:name=".MainActivity_"
        android:configChanges="orientation|keyboardHidden|screenSize"
</activity>

请在此处阅读android:configChanges

片段在Camera Intent后关闭

5 个答案: