Android 调用其他应用-QQ音乐

启动其他应用通用代码：

        Intent intent = new Intent(Intent.ACTION_MAIN);        intent.addCategory(Intent.CATEGORY_LAUNCHER);        ComponentName cn = new ComponentName("packageName", "className");        intent.setComponent(cn);        startActivity(intent);

想要知道一个apk的包名和启动类名，cmd调用sdk/build-tools下的aapt.exe，输入aapt dump badging xxx.apk

关注package:name='com.tencent.qqmusic'

launchable-activity:name='com.tencent.qqmusic.activity.AppStarterActivity'

这个就是包名和他的启动类名。

更多获取方式：http://blog.csdn.net/a7779486/article/details/52277554

只知道包名，不知道启动类的获取方法

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 = getPackageManager().getPackageInfo(packagename, 0);      } catch (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 = 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);      }  }