隐藏虚拟按键

 

 

package com.example.viewexcercises;

import android.os.Bundle;
import android.view.View;
import android.R.layout;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity implements View.OnClickListener,View.OnSystemUiVisibilityChangeListener{

    private View main;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        main=getLayoutInflater().inflate(R.layout.activity_main,null);
        setContentView(main);
        main.setOnClickListener(this);
        //刚开始为可见状态，也是默认状态
        main.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onSystemUiVisibilityChange(int visibility) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        int status=main.getSystemUiVisibility();
        if (status==View.SYSTEM_UI_FLAG_LOW_PROFILE) {
            //虚拟按键将被隐藏,且不占空间
            main.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
        }
        else if(status==View.SYSTEM_UI_FLAG_HIDE_NAVIGATION){
            main.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
        }
        else if (status==View.SYSTEM_UI_FLAG_VISIBLE) {
            //虚拟按键被隐藏，但占一定空间
            main.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
        }

    }

}