学习安卓开发第五天【设置全屏显示】【进度条实例】

代码：

setContentView(R.layout.activity_main);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏显示
        

进度条显示：

package com.example.dema;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.WindowManager;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private ProgressBar progressBar;
    private Handler mHandler;
    private int mProgress = 0;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        progressBar = findViewById(R.id.progressBar);

        mHandler = new Handler() {

            @Override
            public void handleMessage(@NonNull Message msg) {
               if(msg.what==0x111){
                   progressBar.setProgress(mProgress);
               }else{
                   Toast.makeText(MainActivity.this, "耗时操作已完成", Toast.LENGTH_SHORT).show();
               progressBar.setVisibility(View.GONE);

               }
            }
        };
        new Thread(new Runnable() {
            @Override
            public void run() {
               while(true){
                   mProgress=doWork();
                   Message m=new Message();
                   if(mProgress<100){
                       m.what=0x111;
                   mHandler.sendMessage(m);
                   }else{
                       m.what=0x110;
                       mHandler.sendMessage(m);
                       break;
                   }


               }
            }

            private int doWork(){
                mProgress+=Math.random()*10;
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return mProgress;
            }
        }).start();


    }
}

 进度条会一直滚动到100%然后显示“

耗时操作已完成

”