java - 单击 ImageView 时开始新视频

Question

我试图做到这一点，以便当我单击图像框时，播放的视频应该停止线程并开始一个新视频。目前，它给了我一个“IllegalStateException”异常。

如何停止线程并开始一个全新的视频？

public class VideoActivity extends AppCompatActivity {

VideoView videoView;
MediaController mController;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_video);
    playVideo("android.resource://"+ getPackageName() + "/" + R.raw.introductie);
}

protected void onClick(View v)
{
    videoView.stopPlayback();
    switch(v.getId())
    {
        case R.id.imageView2:

            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.introductie);
            break;
        case R.id.imageView3:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.wel_iets_aan_de_hand3);
            break;
        case R.id.imageView4:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.hoe_moet_je_plassen4);
            break;
        case R.id.imageView5:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.wanneer_moet_je_plassen5);
            break;
        case R.id.imageView6:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.hoe_haak_moet_je_plassen6);
            break;
        case R.id.imageView7:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.piponormaalvrachtwagens7);
            break;
        case R.id.imageView8:
            playVideo("android.resource://"+ getPackageName() + "/" + R.raw.pipoobstipatievrachtwagens8);
            break;
    }
}
protected void playVideo(String videoName)
{
    videoView = findViewById(R.id.videoViewId);
    mController = new MediaController(this);
    videoView.setVideoPath(videoName);
    mController.setAnchorView(videoView);
    videoView.setMediaController(mController);
    videoView.start();
}

}

9-06 09:55:21.163 7107-7107/com.example.nepalibinod.catherina E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.nepalibinod.catherina, PID: 7107
java.lang.IllegalStateException: Could not find method videoOne(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatImageView with id 'imageView2'

Answer 1

尝试在代码(Java/Kotlin)而不是 XML 中定义 OnClick 监听器。我假设发生的情况是，您将 android:onClick 分配给 XML 内的按钮，但 android 无法在代码中找到您的方法。

尝试findViewById您的 View 并为其分配一个‍setOnClickListener。