安卓开发——视频播放器

准备工作：

1.需要提前上传一段音视频 我这里是随便找的音视频

在res下新建一个目录放置音视频文件，（将事先准备好的复制粘贴到该目录就可以了）

界面布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.myapplication.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="视频播放器"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.467"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.032" />

    <VideoView
        android:id="@+id/videoView"
        android:layout_width="399dp"
        android:layout_height="341dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.298" />

</android.support.constraint.ConstraintLayout> 

代码设计

package com.example.myapplication;

import android.graphics.PixelFormat;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import android.widget.MediaController;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {
    private VideoView videoView;
    private MediaController mediaController;
    private Uri uri;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        videoView=(VideoView)findViewById(R.id.videoView);
        mediaController=new MediaController(this);
        uri=Uri.parse("android.resource://"+ getPackageName()+ "/"+ R.raw.hetangyuese);
        getWindow().setFormat(PixelFormat.TRANSLUCENT);

        videoView.setVideoURI(uri);
        videoView.setMediaController(mediaController);
        videoView.requestFocus();

    }
} 

运行结果