关于android 应用中安装另一个应用 打开另一个应用 判断另一个应用是否安装

转自：http://blog.csdn.net/jiaruoranshuai/article/details/48677375

1.在一个安卓应用中安装另一个android应用

Intent intent = new Intent(Intent.ACTION_VIEW);intent.setDataAndType(Uri.fromFile(tempApk),"application/vnd.android.package-archive");intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setClassName("com.android.packageinstaller",    "com.android.packageinstaller.PackageInstallerActivity");ctx.startActivity(intent);

2.获取一个apk文件的包名

PackageManager pm = context.getPackageManager();PackageInfo info = pm.getPackageArchiveInfo(Constant.DOWNLOAD_DIR + "/" + functionalls.get(i).getId() + ".apk", PackageManager.GET_ACTIVITIES);//第一个参数是apk文件的路径ApplicationInfo appInfo = null;if (info != null) {    appInfo = info.applicationInfo;    String packageName = appInfo.packageName;    }

3.启动另一个android应用（需要知道包名）

private void doStartApplicationWithPackageName(String packagename) {    // 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等    PackageInfo packageinfo = null;    try {        packageinfo = context.getPackageManager().getPackageInfo(packagename, 0);    } catch (PackageManager.NameNotFoundException e) {        e.printStackTrace();    }    if (packageinfo == null) {        return;    }    // 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);    resolveIntent.setPackage(packageinfo.packageName);    // 通过getPackageManager()的queryIntentActivities方法遍历    List<ResolveInfo> resolveinfoList = context.getPackageManager()            .queryIntentActivities(resolveIntent, 0);    ResolveInfo resolveinfo = resolveinfoList.iterator().next();    if (resolveinfo != null) {        // packagename = 参数packname        String packageName = resolveinfo.activityInfo.packageName;        // 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式：packagename.mainActivityname]        String className = resolveinfo.activityInfo.name;        // LAUNCHER Intent        Intent intent = new Intent(Intent.ACTION_MAIN);        intent.addCategory(Intent.CATEGORY_LAUNCHER);        // 设置ComponentName参数1:packagename参数2:MainActivity路径        ComponentName cn = new ComponentName(packageName, className);        intent.setComponent(cn);        startActivity(intent);    }}

4.判断一个apk文件是否已经安装成功（根据报名判断该应用是否已经成功安装）

private boolean isAppInstalled(String packageName){    PackageManager pm = context.getPackageManager();    boolean installed =false;    try{        pm.getPackageInfo(uri,PackageManager.GET_ACTIVITIES);        installed =true;    }catch(PackageManager.NameNotFoundException e){        installed =false;    }    return installed;}