Android Studio (Kotlin) - VideoView 切换应用程序后变黑

Question

我有一个非常简单的视频在我的主 activity 的底部三分之一处循环播放。当应用程序最小化然后我回来时，视频将停止播放，而是显示黑屏，而且似乎没有办法让它再次播放。（我不想要视频控件。）

这是我的 MainActivity.kt:

import android.app.ActionBar
import android.graphics.Color
import android.net.Uri
import android.os.Bundle
import android.view.View
import android.widget.VideoView
import androidx.appcompat.app.AppCompatActivity

import android.widget.TextView
import android.graphics.drawable.ColorDrawable

class MainActivity :  AppCompatActivity() {

    // declaring a null variable for VideoView
    var simpleVideoView: VideoView? = null

    override fun onCreate(savedInstanceState: Bundle?){
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        supportActionBar?.setDisplayShowTitleEnabled(false)
        supportActionBar?.hide()

        // assigning id of VideoView from
        // activity_main.xml layout file
        simpleVideoView = findViewById<View>(R.id.videoView) as VideoView

        // set the absolute path of the video file which is going to be played
        simpleVideoView!!.setVideoURI(Uri.parse("android.resource://"
                + packageName + "/" + R.raw.gp))

        simpleVideoView!!.requestFocus()

        // starting the video
        simpleVideoView!!.start()

        simpleVideoView!!.setOnCompletionListener { simpleVideoView!!.start() }

    }

}

Answer 1

最简单的解决方案是：

class 主活动：AppCompatActivity() {

    var simpleVideoView: VideoView? = null
    var currentPosition = 0

    override fun onCreate(savedInstanceState: Bundle?){
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        supportActionBar?.setDisplayShowTitleEnabled(false)
        supportActionBar?.hide()

    
        simpleVideoView = findViewById<View>(R.id.videoView) as VideoView

        
        simpleVideoView!!.setVideoURI(Uri.parse("android.resource://"
            + packageName + "/" + R.raw.gp))

        simpleVideoView!!.setOnCompletionListener {     simpleVideoView!!.start() }

    if (savedInstanceState != null) {
        var position = savedInstanceState.getInt("position")
        simpleVideoView!!.seekTo(position)
    }

}

    override fun onStart() {
        super.onStart()
        if (currentPosition != 0)
             simpleVideoView!!.seekTo(currentPosition)

        simpleVideoView!!.start()

    }

    override fun onResume() {
        super.onResume()
        if (!simpleVideoView!!.isPlaying) {
            if (currentPosition != 0)
                simpleVideoView!!.seekTo(currentPosition)

            simpleVideoView!!.start()
        }
    }

    override fun onPause() {
        super.onPause()
        simpleVideoView!!.pause()
        currentPosition = simpleVideoView!!.currentPosition
    }

    override fun onStop() {
         simpleVideoView!!.pause()
         super.onStop()
     }

    override fun onSaveInstanceState(outState: Bundle) {
        outState.putInt("position", currentPosition)
        super.onSaveInstanceState(outState)
    }

}

这会在旋转设备时离开的同一点重新开始播放视频。您可能想查看 android 中的 exoplayer，而不是 VideoView。

Android Studio (Kotlin) - VideoView 切换应用程序后变黑

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android

android-studio

kotlin

android-videoview