36、擷取應用程式圖示和相應的軟體名，用GridView方式展現

標籤：gridview   packagemanager   android   

------------------------------main.java--------------------------

package com.example.rfe;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;


import android.app.ProgressDialog;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;


/**
 * 擷取已經安裝的軟體名及其軟體的包名，該包名可以被用來開啟另一個應用程式
 * 
 * @author Administrator
 * 
 */
public class MainActivity extends ActionBarActivity implements Runnable {


List<Map<String, Object>> list = null;
private ProgressDialog pd;
private PackageManager packageManager;
GridView list_home;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_main);
setTitle("軟體資訊");
list_home = (GridView) findViewById(R.id.list_home);
pd = ProgressDialog.show(this, "請稍候..", "正在收集你已經安裝的軟體資訊...", true,
false);
Thread thread = new Thread(this);
thread.start();
}


private void refreshListItems() {
list = fetch_installed_apps();
MyAdapter myAdapter = new MyAdapter();
list_home.setAdapter(myAdapter);
// 設定actionBar的標題！！
setTitle("軟體資訊,已經安裝" + list.size() + "款應用.");
}


public List fetch_installed_apps() {
List<ApplicationInfo> packages = getPackageManager()
.getInstalledApplications(0);
list = new ArrayList<Map<String, Object>>(packages.size());
Iterator<ApplicationInfo> l = packages.iterator();
packageManager = getPackageManager();
while (l.hasNext()) {
Map<String, Object> map = new HashMap<String, Object>();
ApplicationInfo app = (ApplicationInfo) l.next();
Drawable drawable = app.loadIcon(packageManager);
String label = "";
try {
label = getPackageManager().getApplicationLabel(app).toString();
} catch (Exception e) {
Log.i("Exception", e.toString());
}
map = new HashMap<String, Object>();
map.put("name", label);
map.put("ico", drawable);
list.add(map);
}
return list;
}


@Override
public void run() {
fetch_installed_apps();
handler.sendEmptyMessage(0);
}


private Handler handler = new Handler() {
public void handleMessage(Message msg) {
refreshListItems();
pd.dismiss();
}
};



private class MyAdapter extends BaseAdapter{


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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = View.inflate(MainActivity.this, R.layout.list_item, null);
ImageView iv_item = (ImageView) view.findViewById(R.id.iv_item);
TextView tv_item = (TextView) view.findViewById(R.id.tv_item);

tv_item.setText((CharSequence) list.get(position).get("name"));
Drawable drawable = (Drawable) list.get(position).get("ico");
iv_item.setImageDrawable(drawable);
return view;
}


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


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

}
}

。。。。。。。。。。。。main.xml。。。。。。。。。。。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">




 <GridView
        android:id="@+id/list_home"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="15dip"
        android:numColumns="3"
        android:verticalSpacing="10dip" />
</LinearLayout>

。。。。。。。。。。。。。list_item.xml。。。。。。。。。。。。。。。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:orientation="vertical" >


    <ImageView
        android:id="@+id/iv_item"
        android:layout_width="60dip"
        android:layout_height="60dip"
        android:src="@drawable/ic_launcher" />


    <TextView
        android:id="@+id/tv_item"
        android:textColor="#000000"
        android:textSize="16sp"
        android:text="手機防盜"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />


</LinearLayout>

36、擷取應用程式圖示和相應的軟體名，用GridView方式展現