Question

我正在尝试制作壁纸应用程序。我可以设置壁纸但不能设置其实际尺寸的壁纸。应用程序就像当用户点击GridView中的图像时，它将被设置为wallpaper.Here是代码`

import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.ViewGroup;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.IOException;

public class MainActivity extends Activity {
Integer[] imagesIDs   ={
R.drawable.img8};
Bitmap goal;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(getWindow().FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);
    GridView gridView=(GridView)findViewById(R.id.gridView);
    gridView.setAdapter(new ImageAdapter(this));
    gridView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getBaseContext(),"pic"+(position+1)+"selected",Toast.LENGTH_SHORT).show();
            goal= BitmapFactory.decodeResource(getResources(),imagesIDs[position]);
            DisplayMetrics metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);
            int height = metrics.heightPixels;
            int width = metrics.widthPixels;
            WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());
            try {
                wallpaperManager.setBitmap(goal);
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    });
}


private class ImageAdapter extends BaseAdapter {
    private Context context;
    public ImageAdapter(Context c) {
        context=c;
    }
    @Override
    public int getCount() {
        return imagesIDs.length;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       ImageView imageView;
        if (convertView ==null){
            imageView =new ImageView(context);
            imageView.setLayoutParams(new GridView.LayoutParams(200,200));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        }
        else{
            imageView=(ImageView)convertView;
        }
        imageView.setImageResource(imagesIDs[position]);
        return imageView;
    }


}
}

Answer 1

您已将中心裁剪应用于图像视图

imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

尝试FIT_XY代替CENTER_CROP

注意：FIT_XY会改变图像的宽高比。检查link了解更多信息。

Answer 2

在清单文件中，使用用户权限SET WALLPAPER SIZE HINTS，这将完成工作

如何调整壁纸尺寸

2 个答案: