Android横竖屏幕切换小结_Android

Android手机或平板都会存在横竖屏切换的功能，通常是由物理重力感应触发的，但是有时候也不尽然，通常在设置里面我们可以对手机的横竖屏切换进行关闭。

AndroidManifest.xml

<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="@android:style/Theme.Translucent" />
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.yanlei.yl7" >
<!-- Include required permissions for Google Mobile Ads to run. -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_CONFIGURATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<!-- This meta-data tag is required to use Google Play Services. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity> <!-- Include the AdActivity configChanges and theme. -->
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="@android:style/Theme.Translucent" />
</application>
</manifest>

activity_main.xml

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="获取Configuration信息"
android:textSize="25sp"
android:layout_marginTop="80dip"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="测试ConfigurationChange"
android:textSize="25sp"
android:layout_centerInParent="true"
android:id="@+id/mytext" />
</RelativeLayout>

MainActivity.java

package com.example.yanlei.yl7;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private Button mButton;
private TextView pTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pTextView=(TextView)this.findViewById(R.id.mytext);
System.out.println("---> onCreate()");
init();
}
private void init() {
mButton = (Button) findViewById(R.id.button);
mButton.setOnClickListener(new ClickListenerImpl());
}
private class ClickListenerImpl implements OnClickListener {
@Override
public void onClick(View v) {
getConfigurationInfo();
}
}
private void getConfigurationInfo() {
Configuration configuration = getResources().getConfiguration();
//获取屏幕方向
int l = configuration.ORIENTATION_LANDSCAPE;
int p = configuration.ORIENTATION_PORTRAIT;
if (configuration.orientation == l) {
pTextView.setText("现在是横屏====");
System.out.println("现在是横屏");
}
if (configuration.orientation == p) {
pTextView.setText("现在是竖屏===");
System.out.println("现在是竖屏");
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
//newConfig.orientation获得当前屏幕状态是横向或者竖向
//Configuration.ORIENTATION_PORTRAIT 表示竖向
//Configuration.ORIENTATION_LANDSCAPE 表示横屏
if(newConfig.orientation==Configuration.ORIENTATION_PORTRAIT){
pTextView.setText("现在是竖屏");
Toast.makeText(MainActivity.this, "现在是竖屏", Toast.LENGTH_SHORT).show();
}
if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
pTextView.setText("现在是横屏");
Toast.makeText(MainActivity.this, "现在是横屏", Toast.LENGTH_SHORT).show();
}
}

@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("name", "zxx");
outState.putInt("id", 9527);
System.out.println("---> onSaveInstanceState()");
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
String name = savedInstanceState.getString("name");
int id = savedInstanceState.getInt("id");
System.out.println("---> onRestoreInstanceState()");
System.out.println("名字=" + name + ",编号=" + id);

}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

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