android - 从 SD 卡浏览图像以在 android 的 ImageView 中显示它？

Question

我将 Activity 用作对话框。因为我有按钮来浏览和选择图像以在 ImageView 中显示它。

My Dialog Activity 代码和浏览图片

public class Update_profile extends Activity{

private Uri mImageCaptureUri;

private static final int PICK_FROM_FILE = 1;

private View rootView;
Button save,browse_image;
ImageView profile_pic;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setBackgroundDrawable(new ColorDrawable(0));
    setContentView(R.layout.update_profile);

    Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {
        @Override
        public void uncaughtException(Thread t, Throwable e) {
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(0);
        }
    });

    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);

    this.rootView=findViewById(R.id.update_profile_details);
    profile_pic = (ImageView)findViewById(R.id.update_profile_picture);

    save = (Button)findViewById(R.id.save);
    browse_image = (Button)findViewById(R.id.browse_image);
    browse_image.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            Intent intent = new Intent();

            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);

            startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_FILE);

        }
    });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode != RESULT_OK) return;

    Bitmap bitmap   = null;
    String path     = "";

    if (requestCode == PICK_FROM_FILE) {
        mImageCaptureUri = data.getData(); 
        path = getRealPathFromURI(mImageCaptureUri); //from Gallery
        Log.v("Path", ""+path);

        if (path == null)
            path = mImageCaptureUri.getPath(); //from File Manager
        Log.v("Path", ""+path);

        if (path != null) 
            bitmap  = BitmapFactory.decodeFile(path);
    } else {
        path    = mImageCaptureUri.getPath();
        Log.v("Path", ""+path);
        bitmap  = BitmapFactory.decodeFile(path);
    }

    profile_pic.setImageBitmap(bitmap);     
}

public String getRealPathFromURI(Uri contentUri) {
    String [] proj      = {MediaStore.Images.Media.DATA};
    Cursor cursor       = managedQuery( contentUri, proj, null, null,null);

    if (cursor == null) return null;

    int column_index    = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

    cursor.moveToFirst();

    return cursor.getString(column_index);
}

@SuppressLint("NewApi")
@Override
public boolean onTouchEvent(MotionEvent event) {
   Rect rect = new Rect();
   rootView.getHitRect(rect);
   if (!rect.contains((int)event.getX(), (int)event.getY())){
       setFinishOnTouchOutside(false); 
          return true;
   }
      return false;       
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) {

        finish();
    }
    return true;
}
}

我将 Activity 更改为对话框的 list 代码

<activity
        android:name="test.Update_profile"
        android:excludeFromRecents="true"
        android:launchMode="singleInstance"
        android:screenOrientation="portrait"
        android:theme="@android:style/Theme.Dialog"
        android:windowSoftInputMode="stateHidden" >
</activity>

当我在普通 Activity 中使用上面的浏览图像代码时，意味着它获取图像并在 ImageView 中显示它，但在这个对话框 Activity 中。它现在能够选择图像。我想从对话框 Activity 中获取图像。我不是能够解决这个问题。有谁知道请帮我解决这个问题。

Answer 1

如果你想直接从画廊中检索然后使用这个代码 http://viralpatel.net/blogs/pick-image-from-galary-android-app/

这是我从 SD 卡获取所有文件的方法，你只需将其保存在一个数据 Controller 类中哦老兄

private void getallimages()
            {
                String[] STAR = { "*" };


                final String[] columns = { MediaStore.Images.Thumbnails._ID , MediaStore.Images.Media.DATA};
                final String orderBy = MediaStore.Images.Media.DEFAULT_SORT_ORDER;
                Cursor imagecursor = ((Activity) cntx).managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, STAR, null, null, orderBy);
                int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
                int imgNameIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME);
                int count = imagecursor.getCount();
                for (int i = 0; i < count; i++) {
                    imagecursor.moveToPosition(i);
                    int id = imagecursor.getInt(image_column_index);
                    ImageItem imageItem = new ImageItem();
                    imageItem.id = id;
                    imageItem.filePath = imagecursor.getString(imagecursor.getColumnIndex(MediaStore.Images.Media.DATA));
                    lastId = id;
                    imageItem.img = MediaStore.Images.Thumbnails.getThumbnail(cntx.getContentResolver(), id,MediaStore.Images.Thumbnails.MICRO_KIND, null);
                    imageItem.selection = false; //newly added item will be selected by default
                    controller.images.add(imageItem);
                }

            }

这是 ImageItem 包装类

 public class ImageItem {
            public boolean selection=true;
            public int id;
            public Bitmap img;
            public String filePath;
            public String fileType;
    }