getCropAndSetWallpaperIntent(Uri imageUri)如何工作？

Question

因此，有两个问题与此相同( How to use getCropAndSetWallpaperIntent method in WallpaperManager?和How to use getCropAndSetWallpaperIntent? )，但这两个问题都没有答案。为了得到一个答案，我要问的是--如何让这个方法起作用。

http://developer.android.com/reference/android/app/WallpaperManager.html#getCropAndSetWallpaperIntent(android.net.Uri)，这对我的大脑没有帮助。

但这不起作用

WallpaperManager wallpaperManager = WallpaperManager.getInstance(MainActivity.this);
Uri uri = Uri.parse("android.resource://lv.revo.inspicfootballhd/drawable/v1");
Intent intent = new Intent(wallpaperManager.getCropAndSetWallpaperIntent(uri));
startActivity(intent);

logcat显示

5891-5891/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: lv.revo.inspicfootballhd, PID: 5891
    java.lang.IllegalArgumentException: Image URI must be of the content scheme type
            at android.app.WallpaperManager.getCropAndSetWallpaperIntent(WallpaperManager.java:760)
            at lv.revo.inspicfootballhd.MainActivity.onTouch(MainActivity.java:236)
            at android.view.View.dispatchTouchEvent(View.java:7701)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2338)
            at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1568)
            at android.app.Activity.dispatchTouchEvent(Activity.java:2465)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2285)
            at android.view.View.dispatchPointerEvent(View.java:7886)
            at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3947)
            at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3826)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
            at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3518)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
            at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3575)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
            at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5532)
            at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5512)
            at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5483)
            at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5612)
            at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
            at android.os.MessageQueue.nativePollOnce(Native Method)
            at android.os.MessageQueue.next(MessageQueue.java:138)
            at android.os.Looper.loop(Looper.java:123)
            at android.app.ActivityThread.main(ActivityThread.java:5144)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
            at dalvik.system.NativeStart.main(Native Method)

因此，根据文档“将在意图中设置的图像URI。必须是内容URI，其提供者必须将其类型解析为”image /*“。

图像采用.jpg格式。明天我会继续找出解决办法的。我只是希望一个更聪明的人知道我问题的答案。

编辑/更新1:，因此我设法将uri更改为内容Uri，我相信是这样的。用这个- https://stackoverflow.com/a/23223556/2727408做的

现在它显示了

java.lang.IllegalArgumentException: Cannot use passed URI to set wallpaper; check that the type returned by ContentProvider matches image/*
            at android.app.WallpaperManager.getCropAndSetWallpaperIntent(WallpaperManager.java:792)
            at lv.revo.inspicfootballhd.MainActivity.onTouch(MainActivity.java:244)

我尝试使用ContentResolver getType(contentURI)检查类型，它返回null。现在，我将尝试找到如何将其更改为图像/*。

到目前为止，代码如下所示

Uri uri = ResourceToUri(getApplicationContext(), imageArray[j]);
File wallpaper_file = new File(uri.getPath());
Uri contentURI = getImageContentUri(getApplicationContext(), wallpaper_file.getAbsolutePath());

ContentResolver cr = this.getContentResolver();
Log.d("CONTENT TYPE: ", "IS: " + cr.getType(contentURI));

Intent intent = new Intent(wallpaperManager.getCropAndSetWallpaperIntent(contentURI));
startActivity(intent);

到目前为止谢谢。

编辑/更新2:在这里创建了关于我的新一期的新问题：*

Answer 1

正如错误说明的那样，您需要一个内容URI。内容URI允许您共享具有临时读写权限的文件。

退房：Get a Content URI from a File URI?

Answer 2

File wallpaper_file = new File(uri.getPath());
 Uri contentURI = getImageContentUri(getApplicationContext(),wallpaper_file);

 ContentResolver cr = this.getContentResolver();
 Log.d("CONTENT TYPE: ", "IS: " + cr.getType(contentURI));

 Intent intent = new Intent(wallpaperManager.getCropAndSetWallpaperIntent(contentURI));
startActivity(intent);

public static Uri getImageContentUri(Context context, File imageFile) {
    String filePath = imageFile.getAbsolutePath();
    Cursor cursor = context.getContentResolver().query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            new String[]{MediaStore.Images.Media._ID},
            MediaStore.Images.Media.DATA + "=? ",
            new String[]{filePath}, null);

    if (cursor != null && cursor.moveToFirst()) {
        int id = cursor.getInt(cursor
                .getColumnIndex(MediaStore.MediaColumns._ID));
        Uri baseUri = Uri.parse("content://media/external/images/media");
        return Uri.withAppendedPath(baseUri, "" + id);
    } else {
        if (imageFile.exists()) {
            ContentValues values = new ContentValues();
            values.put(MediaStore.Images.Media.DATA, filePath);
            return context.getContentResolver().insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
        } else {
            return null;
        }
    }
}