1.新建new android application project
theme选none 并打钩创建一个Blank Activity
运行如下图所示:
2。若想把标题栏去掉,更改Manifestr的MainActivity 主题样式
>styles.xml中改
开始将<style name="AppTheme" parent="AppBaseTheme">
改为:<style name="AppTheme" parent="android:Theme.Light.NoTitleBar">//无标题白色背景
去行,闪退并报错:Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
3。原因,是由于public class MainActivity extends ActionBarActivity在创建的时候继承了ActionBarActivity有标题的类,这样就会报错
更改继承FragmentActivity并把相应提示报错处理一下就可以。
具体代码如下:
1 package com.example.abc; 2 3 import android.support.v7.app.ActionBarActivity; 4 import android.support.v7.app.ActionBar; 5 import android.support.v4.app.Fragment; 6 import android.support.v4.app.FragmentActivity; 7 import android.os.Bundle; 8 import android.view.LayoutInflater; 9 import android.view.Menu; 10 import android.view.MenuItem; 11 import android.view.View; 12 import android.view.ViewGroup; 13 import android.os.Build; 14 15 public class MainActivity extends FragmentActivity { 16 17 @Override 18 protected void onCreate(Bundle savedInstanceState) { 19 super.onCreate(savedInstanceState); 20 setContentView(R.layout.activity_main); 21 22 if (savedInstanceState == null) { 23 getSupportFragmentManager().beginTransaction() 24 .add(R.id.container, new PlaceholderFragment()).commit(); 25 } 26 } 27 28 // @Override 29 // public boolean onCreateOptionsMenu(Menu menu) { 30 // 31 // // Inflate the menu; this adds items to the action bar if it is present. 32 // getMenuInflater().inflate(R.menu.main, menu); 33 // return true; 34 // } 35 // 36 // @Override 37 // public boolean onOptionsItemSelected(MenuItem item) { 38 // // Handle action bar item clicks here. The action bar will 39 // // automatically handle clicks on the Home/Up button, so long 40 // // as you specify a parent activity in AndroidManifest.xml. 41 // int id = item.getItemId(); 42 // if (id == R.id.action_settings) { 43 // return true; 44 // } 45 // return super.onOptionsItemSelected(item); 46 // } 47 48 /** 49 * A placeholder fragment containing a simple view. 50 */ 51 public static class PlaceholderFragment extends Fragment { 52 53 public PlaceholderFragment() { 54 } 55 56 @Override 57 public View onCreateView(LayoutInflater inflater, ViewGroup container, 58 Bundle savedInstanceState) { 59 View rootView = inflater.inflate(R.layout.fragment_main, container, 60 false); 61 return rootView; 62 } 63 } 64 65 }
运行正确: