Android 程序中安装其它软件包

#移动开发 #Android

1．介绍
应用程序中有时需要调用其它软件，但有时用户没有安装需要调用的软件，为方便用户使用，以下例程实现了半自动化的引导用户安装。

调用的几种可能性

被调用的软件包已经存在
用户设备存在应用市场程序（如 google market, 掌上应用汇等）
软件安装是否成功（在市场中能否找到软件包，调用市场软件时发生异常）

2．例程

功能
判断文件管理器是否存在，如果不存在，则引导用户从应用市场安装
关键字
应用中，安装，其它软件，apk
可从此处下载可独立运行的代码
[http://download.csdn.net/detail/xieyan0811/4117459

](http://download.csdn.net/detail/xieyan0811/4117459)

核心代码及说明

package com.demo.apk;

import android.app.Activity;

import android.app.AlertDialog;

import android.os.Bundle;

import android.content.Intent;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

import android.net.Uri;

import android.util.Log;

import android.content.pm.PackageManager;

import android.content.pm.PackageInfo;

import android.content.pm.ResolveInfo;

import android.content.DialogInterface;

import java.util.List;

import java.util.ArrayList;

public class MyApkActivity extends Activity {

private String TAG ="demo";

private static finalString APK_NAME = "lysesoft.andexplorer";

private static finalint REQUEST_INSTALL = 1;

@Override

public voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

Button button= new Button(this);

button.setText("test" + APK_NAME);

button.setOnClickListener(newView.OnClickListener() {

publicvoid onClick(View v) {

if(apkExists()) // 软件包中否存在

showExists(); // 提示用户已存在

elseif (!hasMarket()) // 是否有手机市场软件

showWithoutMarket(); // 提示用户无手机市场可用

else

runInstall(); // 安装软件

}

});

setContentView(button);

}

private booleanapkExists() {

PackageManagerpManager = getPackageManager();

List packageInfoList = pManager.getInstalledPackages(0);

for (int i =0; i < packageInfoList.size(); i++) {

PackageInfopkg = packageInfoList.get(i);

Log.d(TAG,"pkg name " + pkg.packageName);

if(pkg.packageName.equals(APK_NAME))

returntrue;

}

return false;

}

public booleanhasMarket() {

List mApps = new ArrayList();

Uri uri =Uri.parse("market://search?q=pname:" + APK_NAME);

Intent intent= new Intent(Intent.ACTION_VIEW, uri);

PackageManagerpManager = getPackageManager();

mApps =pManager.queryIntentActivities(intent,

PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);

Log.d(TAG,"market count " + mApps.size());

if(mApps.size() > 0)

returntrue;

else

returnfalse;

}

private voidshowWithoutMarket() {

AlertDialog.Builderdialog = new AlertDialog.Builder(this);

dialog.setMessage("withoutmarket on smartphone");

dialog.setNegativeButton(android.R.string.cancel,null);

dialog.show();

}

private voidshowExists() {

AlertDialog.Builderdialog = new AlertDialog.Builder(this);

dialog.setMessage("apkalready exists");

dialog.setNegativeButton(android.R.string.cancel,null);

dialog.show();

}

private voidrunInstall() {

Uri uri = Uri.parse("market://search?q=pname:"+ APK_NAME);

Intent it =new Intent(Intent.ACTION_VIEW, uri);

startActivityForResult(it,REQUEST_INSTALL);

}

protected voidonActivityResult(int requestCode, int resultCode,

Intentintent) { // 提示用户如果在市场上找不到软件的解决方法

if(requestCode == REQUEST_INSTALL) {

Log.d(TAG,"resultCode " + resultCode);

Toast.makeText(MyApkActivity.this,

"ifapk can't found in market, please download by PC",

Toast.LENGTH_LONG).show();

}

};

(转载请注明出处)

Android程序中安装其它软件包

Android 程序中安装其它软件包