Android根据包名取得指定程序包的信息（名称、图标……）
本文讨论如何根据包名取得程序包相关信息，本例演示取得Android系统程序的名称和图标（注意：并不是每一个程序包都有程序名称和图标）。
效果图如下：
主程序源码如下：
package com.plter.getsystemicon; import android.app.Activity;import android.content.pm.ApplicationInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView; public class P0001_GetSystemIconActivity extends Activity { private ImageView appIconIv; private TextView appNameTv; private LinearLayout.LayoutParams llp=new LinearLayout.LayoutParams(-2, -2); private LinearLayout mainLayout; private PackageManager pm; private ApplicationInfo appInfo; private Drawable appIcon; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mainLayout=(LinearLayout) findViewById(R.id.mainLayout); appNameTv=new TextView(this); mainLayout.addView(appNameTv, llp); appIconIv=new ImageView(this); mainLayout.addView(appIconIv, llp); pm=getPackageManager(); try { appInfo=pm.getApplicationInfo("system", PackageManager.GET_META_DATA); appNameTv.setText(pm.getApplicationLabel(appInfo)); appIcon=pm.getApplicationIcon(appInfo); appIconIv.setImageDrawable(appIcon); } catch (NameNotFoundException e) { e.printStackTrace(); } }}main.xml布局文件源码如下：
<?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" android:id="@+id/mainLayout" ></LinearLayout>AndroidManifest.xml文件源码如下：
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.plter.getsystemicon" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".P0001_GetSystemIconActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>