Android根据包名取得指定程序包的信息（名称、图标……）

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>