查看Android手机中是否安装了某个应用

List<PackageInfo> list = getPackageManager().getInstalledPackages(PackageManager.GET_PERMISSIONS);

StringBuilder stringBuilder = new StringBuilder();

for (PackageInfo packageInfo : list) {
stringBuilder.append("package name:"+ packageInfo.packageName + "\n");
ApplicationInfo applicationInfo = packageInfo.applicationInfo;
stringBuilder.append("应用名称:"+ applicationInfo.loadLabel(getPackageManager())
+ "\n");
if (packageInfo.permissions != null) {

for (PermissionInfo p : packageInfo.permissions) {
stringBuilder.append("权限包括:" + p.name + "\n");
}
}
stringBuilder.append("\n");