（Android学习系列）三，窗口的常用事件

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.ad02;

 import android.app.Activity;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;

 /**
  * Created by Neil on 2016/4/30.
  */
 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(12345);
     }

     //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

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