摘要:
本节主要涉及到的有activity的创建,标题栏隐藏,button绑定方法(toast的使用),menu使用,活动销毁
1.activity的创建跟注册
创建:
public class TestActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
注册:
<application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".TestActivity" android:label="TestActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application>
2.隐藏标题栏
在TestActivity中的onCreate中调用接口就行
public class TestActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); } }
3.给button绑定方法(toast为例)
(1)创建button
在activity_main.xml(layout处)中新增button
<Button android:id="@+id/button_1" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="alex" />
(2)通过id来绑定方法
public class TestActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); final Button button_test = (Button) findViewById(R.id.button_1); button_test.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(TestActivity.this,"You Click Test Button",Toast.LENGTH_SHORT).show(); } }); } }
3.menu使用
(1).增加menu
默认对应的menu在res/menu中,在这里是menu_main.xml,在这里增加两个选择
<menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/add_item" android:title="Add"/> <item android:id="@+id/remove_item" android:title="Remove"/> </menu>
(2)重写onCreateOptionsMenu ,允许菜单栏显示出来
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
(3)增加菜单栏的响应事件
@Override
public boolean onOptionsItemSelected(MenuItem menu) {
switch (menu.getItemId()) {
case R.id.add_item:
Toast.makeText(this, "You clicked Add", Toast.LENGTH_SHORT).show();
break;
case R.id.remove_item:
Toast.makeText(this, "You clicked Remove", Toast.LENGTH_SHORT).show();
break;
default:
}
return true;
}
4.活动销毁
销毁活动比较简单,绑定某个操作就行了。
button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { finish(); } });