Android onActivityResult问题
我正在创建一个应用程序,在应用程序启动时,相机打开拍摄照片。我还在应用程序中实现了Facebook登录,一切正常。我的问题是我想在一个imageView中显示我在MainActivity布局中添加的图片。没有错误,但图像未显示在imageView中。但当我将onActivityResult方法的名称更改为onActivityResult2时,不会显示图像。当我不更改方法名称时显示图像。我无法将名称保留为onActivityResult,因为在另一个类中,此方法正在处理Facebook登录。我不知道我做错了什么。有人能帮我吗。这是我的完整代码Android onActivityResult问题,android,android-activity,android-imageview,Android,Android Activity,Android Imageview,我正在创建一个应用程序,在应用程序启动时,相机打开拍摄照片。我还在应用程序中实现了Facebook登录,一切正常。我的问题是我想在一个imageView中显示我在MainActivity布局中添加的图片。没有错误,但图像未显示在imageView中。但当我将onActivityResult方法的名称更改为onActivityResult2时,不会显示图像。当我不更改方法名称时显示图像。我无法将名称保留为onActivityResult,因为在另一个类中,此方法正在处理Facebook登录。我不知
public class MainActivity extends FragmentActivity {
private MainFragment mainFragment;
private static final int CAMERA_REQUEST = 1888;
private ImageView imageView;
private Button btn_up, btn_new;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
// Add the fragment on initial activity setup
mainFragment = new MainFragment();
getSupportFragmentManager().beginTransaction().add(android.R.id.content, mainFragment).commit();
} else {
// Or set the fragment from restored state info
mainFragment = (MainFragment) getSupportFragmentManager()
.findFragmentById(android.R.id.content);
}
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.imview);
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
protected void onActivityResult1(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
}
下面是我的片段类
public class MainFragment extends Fragment {
private static final String TAG = "MainFragment";
private UiLifecycleHelper uiHelper;
public Bitmap photo;
private int RESULT_OK = 1;
private ImageView imageView;
private static final int CAMERA_REQUEST = 1888;
private Button btn_up, btn_new;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, container, false);
LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
authButton.setFragment(this);
imageView = (ImageView) view.findViewById(R.id.imview);
btn_new = (Button) view.findViewById(R.id.btn_new);
btn_up = (Button) view.findViewById(R.id.btn_up);
btn_new.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
});
return view;
}
public void onActivityResult1(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
private void onSessionStateChange(Session session, SessionState state, Exception exception) {
if (state.isOpened()) {
Log.i(TAG, "Logged in...");
//LoginButton aButton
} else if (state.isClosed()) {
Log.i(TAG, "Logged out...");
}
}
private Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
onSessionStateChange(session, state, exception);
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
uiHelper = new UiLifecycleHelper(getActivity(), callback);
uiHelper.onCreate(savedInstanceState);
}
@Override
public void onResume() {
super.onResume();
Session session = Session.getActiveSession();
if (session != null &&
(session.isOpened() || session.isClosed()) ) {
onSessionStateChange(session, session.getState(), null);
}
uiHelper.onResume();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uiHelper.onActivityResult(requestCode, resultCode, data);
//authButton.setFragment(this);
}
@Override
public void onPause() {
super.onPause();
uiHelper.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
uiHelper.onDestroy();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
uiHelper.onSaveInstanceState(outState);
}
}
提前感谢。事实上,您的
onActivityResult1()
完全不被调用是很正常的,因为结果的开始模式需要特定的函数签名才能正常工作。您只需:
- 将
MainActivity.onActivityResult(…)中的
MainActivity.onActivityResult(…)方法重命名回
MainActivity.onActivityResult(…)
- 删除
方法,并使MainFragment.onActivityResult1(…)
如下所示:MainFragment.onActivityResult(…)
尝试按收到的Uri加载位图。“数据”并不总是填写的<代码>位图bmp=MediaStore.Images.Media.getBitmap(getContentResolver(),data.getData())代码>我认为这不会是问题,因为在ImageView中正确加载图像之前,我就使用了它。它发生在我更改了activityresult()的名称时。method不要更改它的名称。它希望名称为onActivityResult。您可以使用请求代码来区分请求。当我从按钮单击(在MainFragment类中)拍照时,此代码可以正确处理。但当应用程序启动摄像头打开并拍照时,它就不起作用了。我现在明白了onActivityResult()的正确用法;方法。谢谢。事实上,当您调用
startActivityForResult(…)
时,您应该提供一个请求代码,以简化结果检测:)我很高兴它有帮助。顺便说一句,我仍然不明白什么不起作用。我告诉什么不起作用。我用两种方式打开相机。(1) 当应用程序启动时。(2)在主布局中,当点击按钮时,我有一个“新建”按钮。对于第二个选项,我打开相机,拍摄照片,并在ImageView中显示工作正常。对于选项1,相机打开拍摄pic,但不在ImageView中加载。希望您现在能理解。只有一个小问题,即新拍摄的图像在ImageView中不显示时,前一张图像仍会加载,而新拍摄的图像不会显示在ImageView中,而首先捕获的图像仍会保留在ImageView中。我应该在设置位图之前将imageView设置为null吗?nadeem gc是正确的,imageView在这种情况下不会更新,我面临同样的问题。它不应该被标记为完成,因为最初的问题是imageview没有显示,而且它仍然没有显示。
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
else
uiHelper.onActivityResult(requestCode, resultCode, data);
}