在按鈕單擊時從imageview設置背景-Android

Question

我在項目中有一個Imageview和一個Button，我希望該按鈕將圖像設置為主屏幕背景，但是當我按下該按鈕時，它什么也沒做，沒有錯誤或強制關閉，

謝謝

package com.example.androidhive;

import java.io.IOException;

import android.app.Activity;
import android.app.WallpaperManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

 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]);
    }


 public void setaswall(View view) { // SET AS WALLPAPER BUTTON
     WallpaperManager myWallpaperManager 
     = WallpaperManager.getInstance(getApplicationContext());
     };
  }

Answer 1

使用獲取牆紙管理器

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

要獲取imageView位圖並將其設置為牆紙，請使用

Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
wallpaperManager.setBitmap(bitmap);

或者，如果您具有圖像資源ID（如代碼示例中所示），則可以直接使用

wallpaperManager.setResource(imageAdapter.mThumbIds[position]);