Android 当我在onCreate()中调用startActivity()时,是否执行了另一个生命周期方法
当我调用startActivity()方法来启动onCreate()方法上的其他活动时 是否执行了另一个生命周期方法,如onStart()或onResume() 我有个测试Android 当我在onCreate()中调用startActivity()时,是否执行了另一个生命周期方法,android,oncreate,Android,Oncreate,当我调用startActivity()方法来启动onCreate()方法上的其他活动时 是否执行了另一个生命周期方法,如onStart()或onResume() 我有个测试 AppMain.java @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setCon
AppMain.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_main);
Log.i(TAG, "onCreate");
startActivity(new Intent(AppMain.this,AppOther.class));
}
@Override
protected void onRestart() {
Log.i(TAG, "onRestart");
super.onRestart();
}
@Override
protected void onStart() {
Log.i(TAG, "onStart");
super.onStart();
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
Log.i(TAG, "onRestoreInstanceState");
super.onRestoreInstanceState(savedInstanceState);
}
@Override
protected void onResume() {
Log.i(TAG, "onResume");
super.onResume();
}
@Override
protected void onPause() {
Log.i(TAG, "onPause");
super.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
Log.i(TAG, "onSaveInstanceState");
super.onSaveInstanceState(outState);
}
@Override
protected void onStop() {
Log.i(TAG, "onStop");
super.onStop();
}
@Override
protected void onDestroy() {
Log.i(TAG, "onDestroy");
super.onDestroy();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
Log.i(TAG, "onConfigurationChanged");
super.onConfigurationChanged(newConfig);
}
AppOther.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_other);
Log.i(TAG, "onCreate");
}
@Override
protected void onRestart() {
Log.i(TAG, "onRestart");
super.onRestart();
}
@Override
protected void onStart() {
Log.i(TAG, "onStart");
super.onStart();
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
Log.i(TAG, "onRestoreInstanceState");
super.onRestoreInstanceState(savedInstanceState);
}
@Override
protected void onResume() {
Log.i(TAG, "onResume");
super.onResume();
}
@Override
protected void onPause() {
Log.i(TAG, "onPause");
super.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
Log.i(TAG, "onSaveInstanceState");
super.onSaveInstanceState(outState);
}
@Override
protected void onStop() {
Log.i(TAG, "onStop");
super.onStop();
}
@Override
protected void onDestroy() {
Log.i(TAG, "onDestroy");
super.onDestroy();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
Log.i(TAG, "onConfigurationChanged");
super.onConfigurationChanged(newConfig);
}
日志:
05-29 05:28:11.583: I/AppMain(1257): onCreate
05-29 05:28:11.614: I/AppMain(1257): onStart
05-29 05:28:11.614: I/AppMain(1257): onResume
05-29 05:28:11.643: I/AppMain(1257): onSaveInstanceState
05-29 05:28:11.643: I/AppMain(1257): onPause
05-29 05:28:11.793: I/AppOther(1257): onCreate
05-29 05:28:11.793: I/AppOther(1257): onStart
05-29 05:28:11.793: I/AppOther(1257): onResume
05-29 05:28:12.383: I/AppMain(1257): onStop
我不知道为什么onStart()和onResume()方法仍然可以执行;
startActivity()似乎没有破坏AppMain的生命周期语言苍白,用代码说话。 试试看
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.v(this.getClass().toString(),"onCreate");
//start other Activity
this.startActivity(new Intent(this,OtherActivity.class));
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.v(this.getClass().toString(),"onDestroy");
}
@Override
protected void onPause() {
super.onPause();
Log.v(this.getClass().toString(),"onPause");
}
@Override
protected void onResume() {
super.onResume();
Log.v(this.getClass().toString(),"onResume");
}
@Override
protected void onStart() {
super.onStart();
Log.v(this.getClass().toString(),"onStart");
}
}
日志显示:
问题的范围太窄,但如果您开始另一项活动,当前活动将切换到暂停()。如果您完成了调用的活动,则上一个活动将切换到onResume()。简而言之,如果您启动另一个活动,它将不会调用当前活动的onResume()和onStart()。试着在发帖前阅读你的问题。2.听起来你想检查一些简单的东西-从这两个方法向logcat添加一个调试打印,看看它们是否被调用。你的问题非常模糊。这与上面@zhenghuiyan的答案中显示的代码示例非常矛盾。