android - 无法在 android 中找到 com.android.camera.CropImage Activity

Question

我正在尝试从以下链接运行 PhotoStream 示例

http://android-developers.blogspot.com/2008/09/android-photostream.html

但是当我尝试设置图像的墙纸时(引用类 ViewPhotoActivity.java)，出现以下错误

android.content.ActivityNotFoundException:

Unable to find explicit activity class {com.android.camera/com.android.camera.CropImage}; have you declared this activity in your AndroidManifest.xml?

我认为是以下代码导致了问题

final Intent intent = new Intent("com.android.camera.action.CROP");
intent.setClassName("com.android.camera", "com.android.camera.CropImage");
intent.setData(Uri.fromFile(mFile));
intent.putExtra("outputX", width);
intent.putExtra("outputY", height);
intent.putExtra("aspectX", width);
intent.putExtra("aspectY", height);
intent.putExtra("scale", true);
intent.putExtra("noFaceDetection", true);
intent.putExtra("output", Uri.parse("file:/" + mFile.getAbsolutePath()));
startActivityForResult(intent, REQUEST_CROP_IMAGE);

因为我试图找到这个问题的解决方案但没有得到任何解决方案。

Answer 1

实际上，有相当多的应用程序在 Android 2.x 中提供 CROP 操作:标准图库或 Flikie Wallpapers(仅举几例)。为什么解析 Intent 成功失败，是谷歌更改了提供 API 的组件。在 Android 1.x 中可能是 com.android.gallery，但自从(我认为)API9/Android 2.3.x 以来，默认图库由 Cooliris 提供，因此它类似于 com.cooliris.gallery 等。

在任何手机上解析 Intent 的正确方法是(我使用的代码):

// this is something to keep our information
class CropOption
{
    CharSequence TITLE;
    Drawable ICON;
    Intent CROP_APP;
}

// we will present the available selection in a list dialog, so we need an adapter
class CropOptionAdapter extends ArrayAdapter<CropOption>
{
    private List<CropOption> _items;
    private Context _ctx;

    CropOptionAdapter(Context ctx, List<CropOption> items)
    {
        super(ctx, R.layout.crop_option, items);
        _items = items;
        _ctx = ctx;
    }

    @Override
    public View getView( int position, View convertView, ViewGroup parent )
    {
        if ( convertView == null )
            convertView = LayoutInflater.from( _ctx ).inflate( R.layout.crop_option, null );

        CropOption item = _items.get( position );
        if ( item != null )
        {
            ( ( ImageView ) convertView.findViewById( R.id.crop_icon ) ).setImageDrawable( item.ICON );
            ( ( TextView ) convertView.findViewById( R.id.crop_name ) ).setText( item.TITLE );
            return convertView;
        }
        return null;
    }
}

项目的布局应该是带有 IconView 和 TextView 的水平线性布局。为了简洁起见，我将跳过它，现在你很可能知道如何去做:-)

现在是我们找到 Intent 并将其呈现以供选择的部分(这只是函数的相关部分，onActivityResult):

try
{
    final List<CropOption> cropOptions = new ArrayList<CropOption>();

    // this 2 lines are all you need to find the intent!!!
    Intent intent = new Intent( "com.android.camera.action.CROP" );
    intent.setType( "image/*" );

    List<ResolveInfo> list = getPackageManager().queryIntentActivities( intent, 0 );
    if ( list.size() == 0 )
    {
        // I tend to put any kind of text to be presented to the user as a resource for easier translation (if it ever comes to that...)
        Toast.makeText( this, getText( R.string.error_crop_option ), Toast.LENGTH_LONG );
        // this is the URI returned from the camera, it could be a file or a content URI, the crop app will take any
        _captureUri = null; // leave the picture there
        break; // leave this switch case...
    }

    intent.setData( _captureUri );
    intent.putExtra( "outputX", 128 );
    intent.putExtra( "outputY", 128 );
    intent.putExtra( "aspectX", 1 );
    intent.putExtra( "aspectY", 1 );
    intent.putExtra( "scale", true );
    //intent.putExtra( "", true ); // I seem to have lost the option to have the crop app auto rotate the image, any takers?
    intent.putExtra( "return-data", true );

    for ( ResolveInfo res : list )
    {
        final CropOption co = new CropOption();
        co.TITLE = getPackageManager().getApplicationLabel( res.activityInfo.applicationInfo );
        co.ICON = getPackageManager().getApplicationIcon( res.activityInfo.applicationInfo );
        co.CROP_APP = new Intent( intent );
        co.CROP_APP.setComponent( new ComponentName( res.activityInfo.packageName, res.activityInfo.name ) );
        cropOptions.add( co );
    }

    // set up the chooser dialog
    CropOptionAdapter adapter = new CropOptionAdapter( this, cropOptions );
    AlertDialog.Builder builder = new AlertDialog.Builder( this );
    builder.setTitle( R.string.choose_crop_title );
    builder.setAdapter( adapter, new DialogInterface.OnClickListener() {
        public void onClick( DialogInterface dialog, int item )
        {
            startActivityForResult( cropOptions.get( item ).CROP_APP, ACTIVITY_CROP );
        }
    } );
    builder.setOnCancelListener( new DialogInterface.OnCancelListener() {
        @Override
        public void onCancel( DialogInterface dialog )
        {
            // we don't want to keep the capture around if we cancel the crop because we don't want it anymore
            if ( _captureUri != null )
            {
                getContentResolver().delete( _captureUri, null, null );
                _captureUri = null;
            }
        }
    } );
    AlertDialog alert = builder.create();
    alert.show();
}
catch ( Exception e )
{
    Log.e( TAG, "processing capture", e );
}

好了...希望对您有所帮助，我花了 2 天的时间才弄明白...