版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/wei11556/article/details/73087530
判断是否已安装对应应用
private boolean isInstall(Context context, String packageName) {
final PackageManager packageManager = context.getPackageManager();//获取packagemanager
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);//获取所有已安装程序的包信息
List<String> pName = new ArrayList<String>();//用于存储所有已安装程序的包名
//从pinfo中将包名字逐一取出,压入pName list中
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
pName.add(pn);
}
}
return pName.contains(packageName);//判断pName中是否有目标程序的包名,有TRUE,没有FALSE
}
private boolean isPkgInstalled(String pkgName) {
PackageInfo packageInfo = null;
try {
packageInfo = this.getPackageManager().getPackageInfo(pkgName, 0);
} catch (PackageManager.NameNotFoundException e) {
packageInfo = null;
e.printStackTrace();
}
if (packageInfo == null) {
return false;
} else {
return true;
}
}
打开或是下载
public void open() {
//已安装,打开程序,需传入参数包名:"com.tencent.mm"
if (isInstall(this, "com.tengdi.mobilelaw.mobile.NJ")) {
Intent intent = new Intent();
ComponentName cn = new ComponentName("com.tengdi.mobilelaw.mobile.NJ",
"com.tengdi.mobilelaw.mobile.NJ.MainActivity");
intent.setComponent(cn);
startActivityForResult(intent, RESULT_OK);
}
//未安装,跳转至market下载该程序
else {
Uri uri = Uri.parse("market://details?id=com.tencent.mm");//id为包名
// 直接从指定网址下载
// Uri uri = Uri.parse("http://dldir1.qq.com/foxmail/weixin521android400.apk");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
}
}