只知道某应用的包名，也能够启动相应的应用App

最新推荐文章于 2025-09-16 00:34:35 发布

原创最新推荐文章于 2025-09-16 00:34:35 发布 · 750 阅读

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#packageName 启动另外App

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本文介绍了一种通过指定包名启动Android应用的方法。利用Intent和PackageManager等API，该方法能够查询并启动用户指定的应用程序。

private void startAppWithPackageName(String packagename) {
    PackageInfo packageinfo = null;
    ResolveInfo resolveinfo;
    try {
        packageinfo = getPackageManager().getPackageInfo(packagename, 0);
    } catch (PackageManager.NameNotFoundException e) {
        Toast.makeText(MainActivity.this, "Input packageName is error, please check it!", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
    if (packageinfo == null) {
        Toast.makeText(MainActivity.this, "packageinfo is null!", Toast.LENGTH_SHORT).show();
        return;
    }
    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    resolveIntent.setPackage(packageinfo.packageName);
    List<ResolveInfo> resolveInfoList = getPackageManager().queryIntentActivities(resolveIntent, 0);
    try {
        resolveinfo = resolveInfoList.iterator().next();
    } catch (NoSuchElementException e) {
        Toast.makeText(MainActivity.this, "Input packageName is system thread, please input foreground app's packageName!", Toast.LENGTH_SHORT).show();
        e.printStackTrace();
        return;
    }
    if (resolveinfo != null) {
        String packageName = resolveinfo.activityInfo.packageName;
        String className = resolveinfo.activityInfo.name;
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        ComponentName componentName = new ComponentName(packageName, className);
        intent.setComponent(componentName);
        startActivity(intent);
    }
}