Android横竖屏幕切换小结

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_main.xml

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);
}
}

以上内容给大家介绍了Android横竖屏切换小结的相关知识，希望对大家有所帮助！