ActionBar

• 显示隐藏方法：

  • 在布局文件中设置 theme主题

    <?xml version="1.0" encoding="utf-8"?>
    
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    
        package="com.qf.day15_actionbar_demo1"
    
        android:versionCode="1"
    
        android:versionName="1.0" >
    
        <uses-sdk
    
            android:minSdkVersion="11"
    
            android:targetSdkVersion="18" />
    
        <!--
    
        换主题  换不同的action样式
    
        android:theme="@style/AppTheme"
    
             android:theme="@android:style/Theme.Light"
    
             android:theme="@android:style/Theme.Holo"
    
               android:theme="@android:style/Theme.Holo.Light"
    
                 android:theme="@android:style/Theme.Holo.NoActionBar"
    
        -->
    
        <application
    
            android:allowBackup="true"
    
            android:icon="@drawable/ic_launcher"
    
            android:label="@string/app_name"
    
            android:theme="@style/AppTheme"
    
             >
    
            <activity
    
                android:name="com.qf.day15_actionbar_demo1.MainActivity"
    
                android:label="@string/app_name"
    
                android:uiOptions="splitActionBarWhenNarrow"
    
                >
    
                <intent-filter>
    
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
    
                </intent-filter>
    
            </activity>
    
        </application>
    
    </manifest>

  • 逻辑代码中

    package com.qf.day15_actionbar_demo1;
    
    import android.annotation.SuppressLint;
    
    import android.app.ActionBar;
    
    import android.app.Activity;
    
    import android.os.Bundle;
    
    import android.view.Menu;
    
    import android.view.MenuItem;
    
    import android.view.View;
    
    import android.view.Window;
    
    import android.widget.TextView;
    
    public class MainActivity extends Activity {
    
        private ActionBar actionBar;
    
        private TextView tv;
    
        private int tvSize = 10;
    
        @SuppressLint("NewApi")
    
        @Override
    
        protected void onCreate(Bundle savedInstanceState) {
    
            super.onCreate(savedInstanceState);
    
            //方法控制没有标题栏 // 要在setContent之前设置否则直接奔溃
    
            //requestWindowFeature(Window.FEATURE_NO_TITLE);
    
            //显示
    
    //      requestWindowFeature(Window.FEATURE_ACTION_BAR);
    
            setContentView(R.layout.activity_main);
    
            tv = (TextView) findViewById(R.id.tv);
    
            //获取当前ActionBar
    
            actionBar = getActionBar();
    
            //应用图标是否能点击    带一个向左的箭头 监听的ID是android.R.id.home
    
            actionBar.setDisplayHomeAsUpEnabled(true);
    
            //应用图标是否能点击  不带箭头
    
            //actionBar.setHomeButtonEnabled(true);
    
            //是否显示应用程序图标
    
            actionBar.setDisplayShowHomeEnabled(true);
    
        }
    
        @Override
    
        public boolean onCreateOptionsMenu(Menu menu) {
    
            // Inflate the menu; this adds items to the action bar if it is present.
    
            getMenuInflater().inflate(R.menu.main, menu);
    
            return true;
    
        }
    
        @Override
    
        public boolean onOptionsItemSelected(MenuItem item) {
    
            switch (item.getItemId()) {
    
            case android.R.id.home://应用程序图标的id
    
                finish();
    
                break;
    
            case R.id.action_add:
    
                tvSize+=10;
    
                tv.setTextSize(tvSize);
    
                break;
    
            case R.id.action_call:
    
                tv.setText("拨打电话中....");
    
                break;
    
            case R.id.action_camera:
    
                tv.append("\n"+"美颜拍照");
    
                break;
    
            case R.id.action_delete:
    
                tv.setText("");
    
                break;
    
            default:
    
                break;
    
            }
    
            return super.onOptionsItemSelected(item);
    
        }
    
        public void MyClick(View v){
    
            //判断actionBar是否正在展示
    
            if(actionBar.isShowing()){
    
                actionBar.hide();//隐藏
    
            }else{
    
                actionBar.show();//显示
    
            }
    
        }
    
    }