Question

我在res文件夹中添加了一个名为raw的新文件夹，其中包含mp3文件。下面我添加了一个完整程序，添加setOnSeekBarChangeListener显示空点错误后，ide确实显示了任何错误，但应用程序不断崩溃。但没有任何帮助。这花了我几个小时，但并非没有运气。设备名称Nexus API 24操作系统版本7.0 thnx

package com.example.m1.audiodemo;

import android.content.Context;
import android.media.AudioManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.media.MediaPlayer;
import android.util.Log;
import android.view.View;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends AppCompatActivity {
    MediaPlayer mediaplayer;
    AudioManager audioManager;
    public void playAudio(View view) {

        mediaplayer.start();
    }

    public void pauseAudio(View view) {
        mediaplayer.pause();
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        mediaplayer = MediaPlayer.create(this,R.raw.somempthree);



        SeekBar volumeControl = (SeekBar) findViewById(R.id.seekBar);
        volumeControl.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {


          Log.i("progress bar", Integer.toString(progress));
        }

    });



        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

Answer 1

在setContentView之后编写此代码

java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/0, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/1, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/2, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/3, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/5, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/6, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/7, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/8, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/9, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/11, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/12, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/13, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/14, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/15, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/16, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/17, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/18, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/19, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/20, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/21, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/22, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/23, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/24, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/25, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/27, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/28, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/29, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/30, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/31, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/32, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/33, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/34, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/35, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/36, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/37, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/38, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/39, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/40, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/41, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/42, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/44, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/45, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/46, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/47, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/48, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/49, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/50, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/51, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/52, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/53, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/54, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/55, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/56, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/57, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/58, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/59, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/60, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/61, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/62, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/63, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/64, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/65, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/67, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/68, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/69, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/70, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/71, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/72, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/73, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/74, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/75, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/76, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/78, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/79, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/80, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/81, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/82, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/83, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/84, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/86, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/87, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/88, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/89, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/90, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/91, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/94, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/95, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/96, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/97, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/98, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/99, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/100, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/105, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/106, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/107, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/108, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/109, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/110, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/111, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/112, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/120, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/121, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/122, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/123, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/124, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/125, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/126, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/127, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/128, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/129, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/136, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/137, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/138, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/139, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/140, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/141, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/142, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/143, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/144, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/145, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/146, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/147, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/148, /Users/muskan/AndroidStudioProjects/CSIT_Entrance/app/build/intermediates/transforms/dexBuilder/debug/149

onSeekBarChangeListener导致空对象异常

1 个答案: