android----菜单

菜单要重新二种构造方法

public boolean onCraeatOptionMenu（Menu menu）

{

动态构造菜单的方法

MenuItem item = menu.add(1,100,1,"  菜单一")

item.setTitle("菜单一的名字");//改变菜单的名字

menu.add(1,100,1,"菜单二");

menu.add(1,100,1,"菜单二");

return true；

}

publlic boolean onOptionsItemSelect(MenuItem item)

{

switch(item.getItemId())

{

1.Toast动态悬浮窗显示点击菜单出现的名字

return super.onOptionItemSelected(item);

2.动态跳转到另一个页面

Intent intent=new Intent（MainActivity.this,SActivity.class);

item.setIntent(intent);

}

MainActivity

package com.example.wuzuo.menu;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuItem item= menu.add(1, 100, 1, "菜单一");
item.setTitle("11111");
menu.add(1,101,1,"菜单二");
menu.add(1,102,1,"菜单三");
menu.add(1,103,1,"菜单四");
//getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId())
{
case 100:
Intent intent =new Intent(MainActivity.this,SActivity.class);
item.setIntent(intent);
case 101:
Toast.makeText(MainActivity.this,"菜单二",Toast.LENGTH_LONG).show();
case 102:
Toast.makeText(MainActivity.this,"菜单三",Toast.LENGTH_LONG).show();
case 103:
Toast.makeText(MainActivity.this,"菜单四",Toast.LENGTH_LONG).show();
}
return super.onOptionsItemSelected(item);
}
}


SActivity
package com.example.wuzuo.menu;
import android.app.Activity;
import android.os.Bundle;
/**
* Created by wuzuo on 2016/7/24.
*/
public class SActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sactivity);
}
}


Androidmianfest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wuzuo.menu">

<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=".SActivity">
</activity>
</application>

</manifest>


main 静态创建菜单 先创建一个menu文件，在建立一个main.xlm  android Resouce directery
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

<item
android:id="@+id/action_settings_item1"
android:orderInCategory="100"
android:showAsAction="never"
android:title="菜单一"
/>
<item
android:id="@+id/action_settings_item2"
android:orderInCategory="100"
android:showAsAction="never"
android:title="菜单二"
/>
</menu>