Android 启动加载视频

1：布局

//  res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".MainActivity">

    <XXX.MyVideoView
        android:id="@+id/videoView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/view"
        />
    <View
        android:id="@+id/view"
        android:layout_width="match_parent"
        android:layout_alignParentBottom="true"
        android:background="#ffffff"
        android:layout_height="150dp"/>
    <Button
        android:id="@+id/btn_main"
        android:text="立即体验"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        android:background="@drawable/btn_bg"
        android:layout_marginBottom="50dp"/>
</RelativeLayout>

//   res/drawable/btn_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startColor="#c0000000"  android:endColor="#c0000000" android:angle="90" />
    <solid android:color="#00ffffff" />
    <stroke android:width="3dp" android:color="#ff000000" />
    <corners android:radius="10dp" />
    <padding android:left="3dp" android:top="3dp" android:right="3dp" android:bottom="3dp" />
</shape>

//需重新自定义，他默认适配视频宽高
import android.content.Context;
import android.util.AttributeSet;
import android.widget.VideoView;

public class MyVideoView extends VideoView {

    public MyVideoView(Context context) {
        this(context,null);
    }

    public MyVideoView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public MyVideoView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(0, heightMeasureSpec);
        setMeasuredDimension(width, height);
    }
}

2:Activity

import androidx.appcompat.app.AppCompatActivity;

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {

    private VideoView mVideoView;
    private String mVideoUrl;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //全屏
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView(){
        mVideoView = findViewById(R.id.videoView);
        //加载 /res/raw下的视频进行播放。注意MediaPlayer支持的格式，一般要求后台传输压缩过得MP4视频。
        mVideoUrl = "android.resource://" + getPackageName() + "/" + R.raw.xxx;
        mVideoView.setVideoURI(Uri.parse(mVideoUrl));

        mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.start();
                mp.setLooping(false);
            }
        });

        mVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                mVideoView.suspend();//释放所有配置信息和内存.
                Toast.makeText(getApplicationContext(),"此时可以进入主页面",Toast.LENGTH_LONG).show();
            }
        });
    }
}

3:清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="xxx">
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity"
            android:keepScreenOn="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

//   res/values/styles.xml

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="android:windowFullscreen">true</item>
        <item name="windowNoTitle">true</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
</resources>