如何从imageview设置墙纸

Question

我仍然找不到设置图像从ImageView获取的墙纸的方法。任何人都可以告诉我从android Imageview设置手机壁纸的方法吗？

这是我的代码：

ImageView布局：

<ImageView
    android:contentDescription="My Wallpaper"
    android:id="@+id/full_image_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:saveEnabled="true"
    />

图像视图上的活动

请注意，在用户单击项目后，FullImageActivity中显示的图像是从图像GridView中获取的。

public class FullImageActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.full_image);

    // get intent data
    Intent i = getIntent();

    // Selected image id
    int position = i.getExtras().getInt("id");
    ImageAdapter imageAdapter = new ImageAdapter(this);

    ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
    imageView.setImageResource(imageAdapter.mThumbIds[position]);
}
}

我想在用户触摸屏幕后从上述活动中的图像中设置墙纸，我会弹出询问用户是否要将其设置为墙纸。

Answer 1

无论我在应用程序中使用什么代码，我都张贴了我的代码。当选择了任何图像时，我也从GridView中拍摄了图像。将其设置为墙纸。

但是，我的代码似乎有所不同。我从没使用过ImageView

MainActivity.this

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    GridView gridview = (GridView) findViewById(R.id.gridview);
    gridview.setAdapter(new ImageAdapter(this));

    gridview.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

            ImageAdapter i = (ImageAdapter)parent.getAdapter();                
            Bitmap mBitmap = BitmapFactory.decodeResource(getResources(),(int)i.getItemId(position));

            WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());

            try {
                myWallpaperManager.setBitmap(mBitmap);
                Toast.makeText(MainActivity.this, "Wallpaper set", Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(MainActivity.this, "Error setting wallpaper", Toast.LENGTH_SHORT).show();
            }
        }
    });
}

public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return mFullSizeIds[position];
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

        if (convertView == null) {  
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(300, 250));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);

        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
            R.drawable.wallpaper1t, 
            R.drawable.wallpaper2t, 
            R.drawable.wallpaper3t, 
            R.drawable.wallpaper4t, 
            R.drawable.wallpaper5t, 
            R.drawable.wallpaper6t, 
            R.drawable.wallpaper7t, 
            R.drawable.wallpaper8t
    };

    private Integer[] mFullSizeIds = {
            R.drawable.wallpaper1, 
            R.drawable.wallpaper2, 
            R.drawable.wallpaper3, 
            R.drawable.wallpaper4, 
            R.drawable.wallpaper5, 
            R.drawable.wallpaper6, 
            R.drawable.wallpaper7, 
            R.drawable.wallpaper8
    };
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/gridview"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:numColumns="auto_fit"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:stretchMode="columnWidth"
    android:gravity="center"/>

也许，这对您有很大帮助。

Answer 2

您需要创建一个位图，然后将其设置为墙纸

            Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), IMAGE_ID);
            WallpaperManager myWallpaperManager = WallpaperManager
                    .getInstance(getApplicationContext());

            try {
                myWallpaperManager.setBitmap(mBitmap);
                Toast.makeText(SetWallPaper.this, "Wallpaper set",
                        Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(SetWallPaper.this,
                        "Error setting wallpaper", Toast.LENGTH_SHORT)
                        .show();
            }

其中IMAGE_ID是可绘制对象的资源ID，例如R.drawable.imagename