无法解析方法TimeUnit行

Question

下面是我的活动代码。

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

        b1 = (Button) findViewById(R.id.button);
        b2 = (Button) findViewById(R.id.button2);
        b3 = (Button) findViewById(R.id.button3);
        b4 = (Button) findViewById(R.id.button4);
        iv = (ImageView) findViewById(R.id.imageView);

        tx1 = (TextView) findViewById(R.id.textView2);
        tx2 = (TextView) findViewById(R.id.textView3);
        tx3 = (TextView) findViewById(R.id.textView4);
        tx3.setText("song.mp3");

        mediaPlayer = MediaPlayer.create(this, R.raw.song);
        seekBar = (SeekBar) findViewById(R.id.seekBar);
        seekBar.setClickable(false);
        b2.setEnabled(false);

        b3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), "Playing Now", Toast.LENGTH_LONG).show();
                mediaPlayer.start();

                finalTime = mediaPlayer.getDuration();
                startTime = mediaPlayer.getCurrentPosition();

                if (oneTimeOnly == 0){
                    seekBar.setMax((int) finalTime);
                    oneTimeOnly = 1;
                }
                   /* Problem below line */
                tx2.setText(String.format("%d min, %d sec",
                        TimeUnit.MILLISECOND.toMinutes((long) finalTime),
                        TimeUnit.MILLISECONDS.toMinutes((long) finalTime) -
                        TimeUnit.MINUTE.toSeconds(TimeUnit.MILLISECONDS.toMinutes())));
            }
        });
    }

它在我使用toMinutes的行上显示错误cannot resolve method。文本是红色的。我已经申请了Alt+Enter，但不起作用。你知道怎么解决这个问题吗？

Answer 1

您可能已经导入了此类：

java.util.concurrent.TimeUnit

将其替换为以下内容：

import java.util.concurrent.TimeUnit;

Answer 2

甚至我在eclipse中也遇到了同样的问题，我对TimeUnit的导入出错了(即:导入java.util.concurrent.TimeUnit不能被重新钟爱)。在将构建路径重新配置到Workspace default JRE (在我的案例中是最新的)之后，我能够修复它。在配置构建路径之后-我解决了导入错误。附加捕捉

-

Answer 3

也许最快的方法是使用这个函数：

String msToString(int ms) {

    int hh = ms / 3600000;
    ms -= hh * 3600000;
    int mm = ms / 60000;
    ms -= mm * 60000;
    int ss = ms / 1000;

    return String.format("%d min, %d sec", mm, ss);
}

您的代码将简化为

tx2.setText(msToString(finalTime));