Android开发系列三之窗口的常用事件
时间：2021-03-02 11:45:25|栏目：Android代码|点击： 次
相关阅读：
设置窗口标题事件和在Activity之间跳转。
新建一个项目，新建两个Activity:MainActivity,TitleActivity ,然后再AnroidManifest.xml 中注册TitleActivity
AndroidManifest.xml内容如下
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.neil.ad02"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TitleActivity" android:label="@string/app_name"> </activity> </application> </manifest>
在MainActivity中的onCreate方法中
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d("onCreate","onCreate Method is executed");
Button bt=(Button)findViewById(R.id.btTurnTitle);
bt.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(MainActivity.this,TitleActivity.class));
}
});
}
点击Button就触发TitleActivity的onCreate()->onStart()->onResume()方法
向activity_title.xml中添加一个Button，点击Button就改变app_name的值
TitleActivity中的代码
package com.neil.ad;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
/**
* Created by Neil on //.
*/
public class TitleActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_title);
Button bt=(Button)findViewById(R.id.btTitle);
bt.setOnClickListener((View.OnClickListener) this);
setTitle("窗口标题");
}
public void onClick_SetTitle(View view)
{
setTitle("新窗口标题");
setTitleColor();
}
//在窗口完全开始后调用该方法
@Override
protected void onPostCreate(Bundle savedInstanceState) {
Log.d("TitleActivity","onPostCreate");
super.onPostCreate(savedInstanceState);
}
@Override
protected void onTitleChanged(CharSequence title,int color)
{
super.onTitleChanged(title,color);
Log.d("TitleActivity","onTitleChanged_title"+title);
Log.d("TitleActivity","onTitleChanged_color"+color);
}
}
比较简单，就不多说了。如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！
