文明交通安全出行app开发进度03

activity_main3.xml:

package com.example.trafficapp;

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

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.VideoView;

import com.google.android.material.bottomnavigation.BottomNavigationView;

public class MainActivity3 extends AppCompatActivity {

    private BottomNavigationView btmNavView;
    private VideoView videoView;
    private Button btn_start,btn_end;
    private MediaController mediaController;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        btmNavView = findViewById(R.id.bottom_navigation_menu);

        btmNavView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()){
                    case R.id.navigation_self:
                        startActivity(new Intent(getApplicationContext(),MySelf.class));
                        overridePendingTransition(0,0);
                        return true;
                    case R.id.navigation_answer:
                        startActivity(new Intent(getApplicationContext(),Answer.class));
                        overridePendingTransition(0,0);
                        return true;
                }
                return false;
            }
        });
        initView();
        initView2();
    }
    private void initView() {
        VideoView videoView = (VideoView) findViewById(R.id.videoView);
        btn_start= (Button) findViewById(R.id.btn_start);
        btn_end= (Button) findViewById(R.id.btn_end);


        btn_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                init("cloudy");
            }
        });
        btn_end.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                videoView.stopPlayback();
            }
        });
    }

    private void initView2() {
        videoView= (VideoView) findViewById(R.id.videoView);
        btn_start= (Button) findViewById(R.id.btn_start2);
        btn_end= (Button) findViewById(R.id.btn_end2);


        btn_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                init("bike");
            }
        });
        btn_end.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                videoView.stopPlayback();
            }
        });
    }

    private void init(String name) {
        videoView = (VideoView) findViewById(R.id.videoView);
        mediaController = new MediaController(this);
        String uri;
        if(name.equals("cloudy")) {
            uri = "android.resource://" + getPackageName() + "/" + R.raw.bus;
        } else {
            uri = "android.resource://" + getPackageName() + "/" + R.raw.bike;
        }
        videoView.setVideoURI(Uri.parse(uri));
        videoView.setMediaController(mediaController);
        mediaController.setMediaPlayer(videoView);
        videoView.requestFocus();
        videoView.start();
    }
}

MainActivity3.java:

package com.example.trafficapp;

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

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.VideoView;

import com.google.android.material.bottomnavigation.BottomNavigationView;

public class MainActivity3 extends AppCompatActivity {

    private BottomNavigationView btmNavView;
    private VideoView videoView;
    private Button btn_start,btn_end;
    private MediaController mediaController;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        btmNavView = findViewById(R.id.bottom_navigation_menu);

        btmNavView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()){
                    case R.id.navigation_self:
                        startActivity(new Intent(getApplicationContext(),MySelf.class));
                        overridePendingTransition(0,0);
                        return true;
                    case R.id.navigation_answer:
                        startActivity(new Intent(getApplicationContext(),Answer.class));
                        overridePendingTransition(0,0);
                        return true;
                }
                return false;
            }
        });
        initView();
        initView2();
    }
    private void initView() {
        VideoView videoView = (VideoView) findViewById(R.id.videoView);
        btn_start= (Button) findViewById(R.id.btn_start);
        btn_end= (Button) findViewById(R.id.btn_end);


        btn_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                init("cloudy");
            }
        });
        btn_end.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                videoView.stopPlayback();
            }
        });
    }

    private void initView2() {
        videoView= (VideoView) findViewById(R.id.videoView);
        btn_start= (Button) findViewById(R.id.btn_start2);
        btn_end= (Button) findViewById(R.id.btn_end2);


        btn_start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                init("bike");
            }
        });
        btn_end.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                videoView.stopPlayback();
            }
        });
    }

    private void init(String name) {
        videoView = (VideoView) findViewById(R.id.videoView);
        mediaController = new MediaController(this);
        String uri;
        if(name.equals("cloudy")) {
            uri = "android.resource://" + getPackageName() + "/" + R.raw.bus;
        } else {
            uri = "android.resource://" + getPackageName() + "/" + R.raw.bike;
        }
        videoView.setVideoURI(Uri.parse(uri));
        videoView.setMediaController(mediaController);
        mediaController.setMediaPlayer(videoView);
        videoView.requestFocus();
        videoView.start();
    }
}

完成了app得主页面。也完成了下部导航栏的制作，下一个博客发。

效果图：