使用Intent.ACTION_PICK打开图像

问题描述 投票：0回答：3

我正在尝试使用intent.ACTION_PICK打开图像，但是当我使用startActivityForResoult启动活动时，我的应用程序崩溃了。有什么线索表明我做错了什么吗？ 

    public void button_load_image(View view) {
    String path = Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/" + SimpleCamera.getAlbumName();
    File f = new File(path);

    if (f.exists()) {
        Log.d("button_load_image", "folder exists");
        if (f.isDirectory()) {
            Log.d("button_load_image", "is directory");
            Uri u = Uri.fromFile(f);
            Intent intent = new Intent(Intent.ACTION_PICK, u);
            Log.d("Intent.ACTION_PICK", "IS CREATED");              
            startActivityForResult(intent, REQUEST_CODE_LOAD_IMAGE);                
        }
    }
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case REQUEST_CODE_LOAD_IMAGE:
        if (resultCode == RESULT_OK) {
            Uri imageUri= data.getData();
            Log.d("image selected path", imageUri.getPath());
        }
        break;
    }
}

日志显示：

08-13 17:11:37.594: D/libEGL(3265): loaded /vendor/lib/egl/libEGL_POWERVR_SGX540_120.so
08-13 17:11:37.594: D/libEGL(3265): loaded /vendor/lib/egl/libGLESv1_CM_POWERVR_SGX540_120.so
08-13 17:11:37.602: D/libEGL(3265): loaded /vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so
08-13 17:11:37.664: D/OpenGLRenderer(3265): Enabling debug mode 0
08-13 17:11:46.672: D/album != null(3265): /storage/emulated/0
08-13 17:11:49.914: D/button_load_image(3265): folder exists
08-13 17:11:49.914: D/button_load_image(3265): is directory
08-13 17:11:49.914: D/Intent.ACTION_PICK(3265): IS CREATED
08-13 17:11:49.922: D/AndroidRuntime(3265): Shutting down VM
08-13 17:11:49.922: W/dalvikvm(3265): threadid=1: thread exiting with uncaught exception (group=0x413b0930)
08-13 17:11:49.930: E/AndroidRuntime(3265): FATAL EXCEPTION: main
08-13 17:11:49.930: E/AndroidRuntime(3265): java.lang.IllegalStateException: Could not execute method of the activity
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.view.View$1.onClick(View.java:3597)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.view.View.performClick(View.java:4202)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.view.View$PerformClick.run(View.java:17340)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.os.Handler.handleCallback(Handler.java:725)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.os.Looper.loop(Looper.java:137)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.app.ActivityThread.main(ActivityThread.java:5039)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at java.lang.reflect.Method.invokeNative(Native Method)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at java.lang.reflect.Method.invoke(Method.java:511)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at dalvik.system.NativeStart.main(Native Method)
08-13 17:11:49.930: E/AndroidRuntime(3265): Caused by: java.lang.reflect.InvocationTargetException
08-13 17:11:49.930: E/AndroidRuntime(3265):     at java.lang.reflect.Method.invokeNative(Native Method)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at java.lang.reflect.Method.invoke(Method.java:511)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.view.View$1.onClick(View.java:3592)
08-13 17:11:49.930: E/AndroidRuntime(3265):     ... 11 more
08-13 17:11:49.930: E/AndroidRuntime(3265): Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.PICK dat=file:///storage/emulated/0/simple_pic }
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1622)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1417)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.app.Activity.startActivityForResult(Activity.java:3370)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at android.app.Activity.startActivityForResult(Activity.java:3331)
08-13 17:11:49.930: E/AndroidRuntime(3265):     at com.example.mc.MC_Memu.button_load_image(MC_Memu.java:53)
08-13 17:11:49.930: E/AndroidRuntime(3265):     ... 14 more
android android-intent
3个回答
9
投票

ACTION_PICK 允许用户从任何注册了此类操作的已安装应用程序中选择图像。无法指定从哪个相册中选择。用户可以自行决定使用哪个应用程序并浏览到所需的相册以选择照片。

所以取出文件夹参数，你可以试试这个：

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, REQUEST_CODE_LOAD_IMAGE);

在 onActivityResult 中，除了 RESULT_OK 之外，您还应该检查 data.getData() != null，因为应用程序可以正确关闭（而不是取消）而不返回图像。

1
投票
public class MainActivity extends AppCompatActivity {
ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    imageView= findViewById(R.id.image);
}

public void openImage(View view) {
    Intent intent= new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
    startActivityForResult(intent,100);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==100&&resultCode==RESULT_OK){
        Uri uri=data.getData();
        imageView.setImageURI(uri);
    }
}

}

0
投票

如果您在“PickVisualMedia.ImageOnly.INSTANCE”这一行中收到错误，请尝试此操作 .build()”，忽略它：

// Registers a photo picker activity launcher in single-select mode.
    ActivityResultLauncher<PickVisualMediaRequest> pickMedia =
            registerForActivityResult(new PickVisualMedia(), uri -> {
        // Callback is invoked after the user selects a media item or closes the
        // photo picker.
        if (uri != null) {
            Log.d("PhotoPicker", "Selected URI: " + uri);
        } else {
            Log.d("PhotoPicker", "No media selected");
        }
    });
   
  
    // Launch the photo picker and let the user choose only images.
    pickMedia.launch(new PickVisualMediaRequest.Builder()
            .setMediaType(PickVisualMedia.ImageOnly.INSTANCE)
            .build());
    
   
    // Launch the photo picker and let the user choose only images/videos of a
    // specific MIME type, such as GIFs.
    String mimeType = "image/gif";
    pickMedia.launch(new PickVisualMediaRequest.Builder()
            .setMediaType(new PickVisualMedia.SingleMimeType(mimeType))
            .build());
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