Android基于Toolbar实现顶部标题栏及后退键

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<android.support.design.widget.CoordinatorLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"
  xmlns:app=\"http://schemas.android.com/apk/res-auto\"
  xmlns:tools=\"http://schemas.android.com/tools\"
  android:layout_width=\"match_parent\"
  android:layout_height=\"match_parent\"
  tools:context=\".MainActivity\">

  <android.support.design.widget.AppBarLayout
    android:layout_width=\"match_parent\"
    android:layout_height=\"wrap_content\"
    android:theme=\"@style/AppTheme.AppBarOverlay\">

    <android.support.v7.widget.Toolbar
      android:id=\"@+id/toolbar\"
      android:layout_width=\"match_parent\"
      android:layout_height=\"wrap_content\"
      android:background=\"?attr/colorPrimary\"
      app:popupTheme=\"@style/AppTheme.PopupOverlay\">

      <TextView
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        android:layout_centerInParent=\"true\"
        android:layout_gravity=\"center\"
        android:text=\"设置\"
        android:textSize=\"22sp\" />
    </android.support.v7.widget.Toolbar>
  </android.support.design.widget.AppBarLayout>

</android.support.design.widget.CoordinatorLayout>

<resources>

  <!-- Base application theme. -->
  <style name=\"AppTheme\" parent=\"Base.Theme.AppCompat.Light\">
    <!-- Customize your theme here. -->
    <item name=\"colorPrimary\">@color/colorPrimary</item>
    <item name=\"colorPrimaryDark\">@color/colorPrimaryDark</item>
    <item name=\"colorAccent\">@color/colorAccent</item>
  </style>

  <style name=\"AppTheme.NoActionBar\">
    <item name=\"windowActionBar\">false</item>
    <item name=\"windowNoTitle\">true</item>
  </style>

  <style name=\"AppTheme.AppBarOverlay\" parent=\"ThemeOverlay.AppCompat.Dark.ActionBar\" />

  <style name=\"AppTheme.PopupOverlay\" parent=\"ThemeOverlay.AppCompat.Light\" />

</resources>

package action.sun.com.testtoobar1;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    /*getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);  //设置全屏*/
    setContentView(R.layout.activity_main);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

    //一定要加，为了去掉本身的标题文字
    toolbar.setTitle(\"\");
    //初始化toolbar
    setSupportActionBar(toolbar);
    //左边的小箭头（注意需要在setSupportActionBar(toolbar)之后才有效果）
    toolbar.setNavigationIcon(R.mipmap.back);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    Toast.makeText(MainActivity.this, \"选择了菜单\", Toast.LENGTH_SHORT).show();
    //初始化右边的菜单选项
    //getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    Toast.makeText(MainActivity.this, \"选择了后退按钮=\"+id, Toast.LENGTH_SHORT).show();
    //noinspection SimplifiableIfStatement
    return super.onOptionsItemSelected(item);
  }
}