尝试从我的主要活动中打开相机时出现错误。我不知道我设置错误接收错误java.lang.IllegalArgumentException：找不到id的视图。任何解决此问题的方法都将受到赞赏。
MainActivity. Java
public class MainActivity extends Activity {
private static final int SELECT_PICTURE = 0;
private static final int IMAGE_CAPTURE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean titled = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.activity_main);
if(titled){
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title_bar_main);
}
((ImageButton) findViewById(R.id.button1))
.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// in onCreate or any event where your want the user to
// select a file
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
//check if there is app to receive intent
PackageManager packageManager = getPackageManager();
List<ResolveInfo> activities = packageManager.queryIntentActivities(intent, 0);
@SuppressWarnings("unused")
boolean isIntentSafe = activities.size() > 0;
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), SELECT_PICTURE);
}
});
((ImageButton) findViewById(R.id.button2))
.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
getFragmentManager().beginTransaction()
.replace(R.id.container, Camera2BasicFragment.newInstance())
.commit();
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
Intent intent = new Intent(this, EditImage.class);
intent.setType("/*image");
intent.setData(selectedImageUri);
intent.putExtra("EditMode", false);
startActivity(intent);
}
else if (requestCode == IMAGE_CAPTURE)
{
//File dir = Environment .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
//File output = new File(dir, "camerascript.png");
//String cPath = output.getAbsolutePath();
Intent Camera2BasicFragment = new Intent(this, EditImage.class);
Camera2BasicFragment.setType("/*image");
Camera2BasicFragment.setData(data.getData());
//if edit mode is 1, intent is from camera
Camera2BasicFragment.putExtra("EditMode", true);
startActivity(Camera2BasicFragment);
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
Camera2BasicFragment.java
public class Camera2BasicFragment extends Fragment implements View.OnClickListener {
/**
* Conversion from screen rotation to JPEG orientation.
*/
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
ORIENTATIONS.append(Surface.ROTATION_0, 90);
ORIENTATIONS.append(Surface.ROTATION_90, 0);
ORIENTATIONS.append(Surface.ROTATION_180, 270);
ORIENTATIONS.append(Surface.ROTATION_270, 180);
}
/**
* Tag for the {@link Log}.
*/
private static final String TAG = "Camera2BasicFragment";
/**
* Camera state: Showing camera preview.
*/
private static final int STATE_PREVIEW = 0;
/**
* Camera state: Waiting for the focus to be locked.
*/
private static final int STATE_WAITING_LOCK = 1;
/**
* Camera state: Waiting for the exposure to be precapture state.
*/
private static final int STATE_WAITING_PRECAPTURE = 2;
/**
* Camera state: Waiting for the exposure state to be something other than precapture.
*/
private static final int STATE_WAITING_NON_PRECAPTURE = 3;
/**
* Camera state: Picture was taken.
*/
private static final int STATE_PICTURE_TAKEN = 4;
/**
* {@link TextureView.SurfaceTextureListener} handles several lifecycle events on a
* {@link TextureView}.
*/
private final TextureView.SurfaceTextureListener mSurfaceTextureListener
= new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) {
openCamera(width, height);
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) {
configureTransform(width, height);
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) {
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture texture) {
}
};
/**
* ID of the current {@link CameraDevice}.
*/
private String mCameraId;
/**
* An {@link AutoFitTextureView} for camera preview.
*/
private AutoFitTextureView mTextureView;
/**
* A {@link CameraCaptureSession } for camera preview.
*/
private CameraCaptureSession mCaptureSession;
/**
* A reference to the opened {@link CameraDevice}.
*/
private CameraDevice mCameraDevice;
/**
* The {@link android.util.Size} of camera preview.
*/
private Size mPreviewSize;
/**
* {@link CameraDevice.StateCallback} is called when {@link CameraDevice} changes its state.
*/
private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice cameraDevice) {
// This method is called when the camera is opened. We start camera preview here.
mCameraOpenCloseLock.release();
mCameraDevice = cameraDevice;
createCameraPreviewSession();
}
@Override
public void onDisconnected(CameraDevice cameraDevice) {
mCameraOpenCloseLock.release();
cameraDevice.close();
mCameraDevice = null;
}
@Override
public void onError(CameraDevice cameraDevice, int error) {
mCameraOpenCloseLock.release();
cameraDevice.close();
mCameraDevice = null;
Activity activity = getActivity();
if (null != activity) {
activity.finish();
}
}
};
static class CompareSizesByArea implements Comparator<Size> {
@Override
public int compare(Size lhs, Size rhs) {
//
public static class ErrorDialog extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Activity activity = getActivity();
return new AlertDialog.Builder(activity)
.setMessage("This device doesn't support Camera2 API.")
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
activity.finish();
}
})
.create();
}
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background_color"
tools:context=".MainActivity" >
<ImageButton
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:contentDescription="@string/startApp"
android:src="@drawable/gallery_icon"
android:background="@android:color/transparent"
android:text="@string/startApp" />
<ImageButton
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/button1"
android:layout_centerHorizontal="true"
android:contentDescription="@string/startApp"
android:src="@drawable/lense_icon"
android:background="@android:color/transparent"
android:text="@string/startApp" />
</RelativeLayout>
fragment_camera2_basic.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.example.android.camera2basic.AutoFitTextureView
android:id="@+id/texture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_below="@id/texture"
android:background="#4285f4">
<Button
android:id="@+id/picture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/picture" />
<ImageButton
android:id="@+id/info"
android:contentDescription="@string/description_info"
style="@android:style/Widget.Material.Light.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|right"
android:padding="20dp"
android:src="@drawable/ic_action_info" />
</FrameLayout>
</RelativeLayout>
答案 0 :(得分：0)
您是否已分配Android权限以使用Android相机？
答案 1 :(得分：0)
请注意，您的ImageButton听众正在寻找Camera2BasicFragment来代替R.id.container所居住的任何片段：
((ImageButton) findViewById(R.id.button2))
.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
getFragmentManager().beginTransaction()
.replace(R.id.container, Camera2BasicFragment.newInstance())
.commit();
}
});
但是，您的FrameLayout视图层次结构中没有定义这样的容器MainActivity。您的activity_main.xml布局文件仅列出两个ImageButton。