Android 自定義標題欄的實例詳解

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  android:id="@+id/re_title" xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="50dp" //定義自定義標題欄的高度
  android:background="@color/start_background"
  android:orientation="horizontal">

  <ImageButton
    android:scaleType="fitXY"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:layout_marginLeft="10dp"
    android:id="@+id/bt_back"
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:src="@drawable/left_back"
    android:background="@color/touming"/>
  <TextView
    android:id="@+id/mytitle"
    android:layout_centerInParent="true"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:gravity="center"http://使文字在整個標題欄的中間
    android:textColor="#fff"
    android:textSize="20dp" />

</RelativeLayout >

<resources>
  <!-- 自定義標題欄 parent="android:Theme" 這個屬性必須寫 -->
  <style name="mytitlestyle" parent="android:Theme">
    <!-- 設置高度，和 mytitlebar.xml中保持一致 -->
    <item name="android:windowTitleSize">50dp</item>
    <!-- 設置內(nèi)填充為0 使自定義標題填充整個標題欄，否則左右兩邊有空隙 -->
    <item name="android:padding">0dp</item>
  </style>
</resources>

public class CustomTitleBar {

  private Activity mActivity;
  //不要使用 static 因為有三級頁面返回時會報錯

  /**
   * @param activity
   * @param title
   * @see [自定義標題欄]
   */
  public void getTitleBar(Activity activity, String title) {
    mActivity = activity;
   activity.requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
   //指定自定義標題欄的布局文件
    activity.setContentView(R.layout.mytitlebar);
    activity.getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,
        R.layout.mytitlebar);
//獲取自定義標題欄的TextView控件并設置內(nèi)容為傳遞過來的字符串
    TextView textView = (TextView) activity.findViewById(R.id.mytitle);
    textView.setText(title);
    //設置返回按鈕的點擊事件
    ImageButton titleBackBtn = (ImageButton) activity.findViewById(R.id.bt_back);
    titleBackBtn.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
      //調(diào)用系統(tǒng)的返回按鍵的點擊事件
        mActivity.onBackPressed();
      }
    });
  }
}

public class food extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //實例化CustomTitleBar 傳遞相應的參數(shù)
    CustomTitleBar ct = new CustomTitleBar();
    ct.getTitleBar(this, "美食");
    setContentView(R.layout.page_food);
  }
}

//省略了其余部分，android:theme="@style/mytitlestyle"這句必需寫
<activity
      android:name=".food"
      android:label="@string/activity_food"
      android:theme="@style/mytitlestyle" />