安卓中改变手机壁纸

以你之姓@ 2022-09-19 15:26 239阅读 0赞

布局文件如下:

XML文件如下所示:
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#000000"
        android:orientation="vertical" >
    
        <Button
            android:id="@+id/btn_reset"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/returns" />
    
        <ImageView
            android:id="@+id/iv_current"
            android:layout_width="80dp"
            android:layout_height="130dp"
            android:layout_gravity="center_horizontal"
            android:contentDescription="@string/action_settings" />
    
        <Button
            android:id="@+id/btn_current"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/getcurrent" />
    
        <Gallery
            android:id="@+id/gallery"
            android:layout_width="match_parent"
            android:layout_height="150dp"
            android:layout_gravity="center"
             />
    
        <Button
            android:id="@+id/btn_setwall"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/setcurretn" />
    
    </LinearLayout>

安卓手机壁纸的改变  
<1>要实现这一功能需要添加一个权限  
   
    <uses-permission android:name="android.permission.SET\_WALLPAPER" />

代码实现如下所示:
    一、需要创建一个适配器

package com.brucecheng.waller;
    
    import android.content.Context;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.Gallery;
    import android.widget.ImageView;
    
    @SuppressWarnings("deprecation")
    public class WallPaper extends BaseAdapter {
    
    	//创建资源数组
    	private int[] imageIds;
    	private Context context;
    	//重写构造方法
    	public WallPaper(Context context,int[] imageIds){
    		this.imageIds=imageIds;
    		this.context=context;
    	}
    	@Override
    	public int getCount() {
    		return imageIds.length;
    	}
    
    	@Override
    	public Object getItem(int position) {
    		return imageIds[position];
    	}
    
    	@Override
    	public long getItemId(int position) {
    		
    		return position;
    	}
    
    	@Override
    	public View getView(int position, View convertView, ViewGroup parent) {
    		//创建一个ImageView用于显示壁纸图片
    		ImageView iv=new ImageView(context);
    		//设置参数
    		iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
    		iv.setLayoutParams(new Gallery.LayoutParams(120, 120));
    		iv.setImageResource(imageIds[position]);
    		return iv;
    	}

二、Activity的代码实现如下所示:
    package com.brucecheng.waller;
    
    import java.io.IOException;
    import java.io.InputStream;
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemSelectedListener;
    import android.widget.Button;
    import android.widget.Gallery;
    import android.widget.ImageView;
    
    @SuppressWarnings("deprecation")
    public class WallerActivity extends Activity {
    
    	//创建资源数组
    	private int[] imageIds={R.drawable.bing11,
    			R.drawable.bing12,
    			R.drawable.bing5,
    			R.drawable.bing6,
    			R.drawable.bing7,
    			R.drawable.album,
    	};
    	//创建一个整型值表示当前的壁纸
    	int currentIndex=-1;
    	//寻找控件
    	Gallery gallery;
    	Button btn_reset,btn_current,btn_setwall;
    	ImageView iv_current;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		//调用方法实例化控件
    		findViewById();
    		//为gallery绑定适配器
    		gallery.setAdapter(new WallPaper(this, imageIds));
    		//设置监听事件
    		gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
    
    			@Override
    			public void onItemSelected(AdapterView<?> parent, View view,
    					int position, long id) {
    				//记录被选中的图片索引
    				currentIndex=position;
    			}
    			@Override
    			public void onNothingSelected(AdapterView<?> parent) {
    			}
    		});
    		//为其他的控件设置监听事件
    		btn_current.setOnClickListener(listener);
    		btn_setwall.setOnClickListener(listener);
    		btn_reset.setOnClickListener(listener);
    	}
    	//重写监听事件
    	OnClickListener listener=new OnClickListener() {
    
    		@Override
    		public void onClick(View v) {
    			switch (v.getId()) {
    			//获取当前壁纸
    			case R.id.btn_current:
    				iv_current.setBackgroundDrawable(getWallpaper());
    				break;
    				//设置壁纸
    			case R.id.btn_setwall:
    				InputStream in=WallerActivity.this.getResources().openRawResource(imageIds[currentIndex]);
    				//设为当前壁纸
    				try {
    					setWallpaper(in);
    				} catch (IOException e1) {
    					e1.printStackTrace();
    				}
    				break;
    				//恢复默认壁纸
    			case R.id.btn_reset:
    				try {
    					WallerActivity.this.clearWallpaper();
    				} catch (Exception e) {
    					e.printStackTrace();
    				}
    				break;
    			}
    		}
    	};
    	//自定义方法实例化控件
    	public void findViewById(){
    		btn_current=(Button) findViewById(R.id.btn_current);
    		btn_reset=(Button) findViewById(R.id.btn_reset);
    		btn_setwall=(Button) findViewById(R.id.btn_setwall);
    		iv_current=(ImageView) findViewById(R.id.iv_current);
    		gallery=(Gallery) findViewById(R.id.gallery);
    	}
    }