Android GridView控件
2020-12-23 # Android # GridView
  • home_activity.xml：
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    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#000000" >
        
        <GridView
            android:id="@+id/gridView1"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </GridView>

    </RelativeLayout>
  • HomeActivity.java
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package cccc.cccc;

import java.util.ArrayList;
import java.util.List;
import com.example.gridviewstudy.R;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.widget.GridView;

public class HomeActivity extends Activity {
	
	private GridView mGridView;
	private List<AppInfo> appInfos;
	
	@SuppressLint("InlinedApi")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		this.requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏  
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); //透明状态栏  
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);//透明导航栏  
		setContentView(R.layout.home_activity);
		mGridView = (GridView)this.findViewById(R.id.gridView1);
		getData();
		mGridView.setNumColumns(6);
		GridViewAdapter adapter = new GridViewAdapter(appInfos,this);
		mGridView.setAdapter(adapter);
	}

	private void getData() {
		PackageManager packageManager = this.getPackageManager();
		List<PackageInfo> packageInfos = packageManager.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
		appInfos = new ArrayList<AppInfo>();
		for(PackageInfo packageInfo:packageInfos){
			AppInfo appInfo = new AppInfo();
			appInfo.setAppName(packageInfo.applicationInfo.loadLabel(packageManager).toString());
			appInfo.setAppPackage(packageInfo.packageName);
			appInfo.setAppVersion(packageInfo.versionName);
			appInfo.setDrawable(packageInfo.applicationInfo.loadIcon(packageManager));
			appInfo.setUserApp(filterApp(packageInfo.applicationInfo));
			if(appInfo.isUserApp()){
				appInfos.add(appInfo);
			}
		}
	}
	
	public boolean filterApp(ApplicationInfo info) {
		if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
			return true;
		} else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
			return true;
		}
		return false;

	}
}
  • AppInfo.java
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package cccc.cccc;

import android.graphics.drawable.Drawable;

public class AppInfo {
	private String appName;    // 获取应用程序的名称，不是包名，而是清单文件中的labelname
	private String appVersion; // 获取应用程序的版本号码
	private Drawable drawable; // 获取应用程序的快捷方式图标
	private boolean isUserApp; // 获取应用程序是否是第三方应用程序
	private String appPackage; //给一同程序设置包名
	public String getAppName() {
		return appName;
	}
	public void setAppName(String appName) {
		this.appName = appName;
	}
	public String getAppVersion() {
		return appVersion;
	}
	public void setAppVersion(String appVersion) {
		this.appVersion = appVersion;
	}
	public Drawable getDrawable() {
		return drawable;
	}
	public void setDrawable(Drawable drawable) {
		this.drawable = drawable;
	}
	public boolean isUserApp() {
		return isUserApp;
	}
	public void setUserApp(boolean isUserApp) {
		this.isUserApp = isUserApp;
	}
	public String getAppPackage() {
		return appPackage;
	}
	public void setAppPackage(String appPackage) {
		this.appPackage = appPackage;
	}
	
}

  • GridViewAdapter.java
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package cccc.cccc;

import java.util.List;

import com.example.gridviewstudy.R;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class GridViewAdapter extends BaseAdapter {
	
	private List<AppInfo> appInfos = null;
	private Context mContext = null;
	private LayoutInflater inflater = null;  
	
	public GridViewAdapter(List<AppInfo> appInfos,Context context) {
		this.appInfos = appInfos;
		this.mContext = context;
		inflater = LayoutInflater.from(mContext);
	}

	@Override
	public int getCount() {
		return appInfos.size();
	}

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

	@Override
	public long getItemId(int position) {
		return 0;
	}

	@SuppressLint("InflateParams")
	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		Holder holder;
		if(convertView == null){
			convertView = inflater.inflate(R.layout.gridview_item,null);
			holder = new Holder();
			holder.icon = (ImageView)convertView.findViewById(R.id.imageView1);
			holder.name = (TextView)convertView.findViewById(R.id.textview1);
			convertView.setTag(holder);
		}else{
			holder = (Holder)convertView.getTag();
		}
		holder.icon.setImageDrawable(appInfos.get(position).getDrawable());
		holder.name.setText(appInfos.get(position).getAppName());
		convertView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				startAPP(appInfos.get(position).getAppPackage());
			}
		});
		return convertView;
	}
	
	public class Holder{
		ImageView icon;
		TextView name;
	}
	
	public void startAPP(String appPackageName){
	    try{
	        Intent intent = mContext.getPackageManager().getLaunchIntentForPackage(appPackageName);
	        mContext.startActivity(intent);
	    }catch(Exception e){
	    	e.printStackTrace();
	    }
	}
}

  • gridview_item.xml
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    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="110dp"
        android:layout_height="wrap_content" >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@drawable/ic_launcher" />
        
        <TextView
            android:id="@+id/textview1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/imageView1"
            android:text="textview1"
            android:maxLines="1"
            android:textSize="10sp"
            android:textColor="#ffffff"
            android:layout_centerHorizontal="true"/>
        
    </RelativeLayout>
  • AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.gridviewstudy"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name="cccc.cccc.HomeActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

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