我在QT有一个
Android应用程序.
我想从一个按钮调用android设置.
我想从一个按钮调用android设置.
我在Java中使用了这段代码：
public void usb(View v){
Intent intent = new Intent();
intent.setClassName("com.android.settings","com.android.settings.DevelopmentSettings");
startActivity(intent);
}
有没有办法使用QT C调用android设置？
解决方法
QAndroidJniObject可以从Qt C代码创建JNI对象.
例如：获取活动：
QAndroidJniObject activity = QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative","activity","()Landroid/app/Activity;");
例如：创建一个新的Intent：
QAndroidJniObject intent("android/content/Intent","()V");
然后你可以一步一步地从C语言中执行你的java代码….
要回答您的具体问题,只需复制/粘贴此代码：
QAndroidJniObject activity = QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative","()Landroid/app/Activity;"); //activity is valid
if ( activity.isValid() )
{
// Equivalent to Jave code: 'Intent intent = new Intent();'
QAndroidJniObject intent("android/content/Intent","()V");
if ( intent.isValid() )
{
QAndroidJniObject param1 = QAndroidJniObject::fromString("com.android.settings");
QAndroidJniObject param2 = QAndroidJniObject::fromString("com.android.settings.DevelopmentSettings");
if ( param1.isValid() && param2.isValid() )
{
// Equivalent to Jave code: 'intent.setClassName("com.android.settings","com.android.settings.DevelopmentSettings");'
intent.callObjectMethod("setClassName","(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;",param1.object<jobject>(),param2.object<jobject>());
// Equivalent to Jave code: 'startActivity(intent);'
activity.callObjectMethod("startActivity","(Landroid/content/Intent;)V",intent.object<jobject>());
}
}
}
……然后投票！ 原文链接：https://www.f2er.com/android/313931.html
