編程-為什麼不能播放mp3文件?

為什麼不能播放mp3文件?

SimpleImplicitIntentActivity.java

 package com.example.ch02_simpleimplicitintent;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


public class SimpleImplicitIntentActivity extends Activity implements OnClickListener{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_implicit_intent);
        Button button1=(Button)findViewById(R.id.bt1);
        button1.setOnClickListener(this );
       }



        public void onClick(View v)
        {
        switch (v.getId())
        {
        case R.id.bt1:

            Uri myuri=Uri.parse("file:///sdcard0/hua.mp3");

             Intent oneIntent=new Intent(Intent.ACTION_VIEW);
             oneIntent.setDataAndType(myuri,"audio/mp3");
             startActivity(oneIntent);
        }

        }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.simple_implicit_intent, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

activity_simple_implicit_intent.xml

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.ch02_simpleimplicitintent.SimpleImplicitIntentActivity" >



    <Button
            android:id="@+id/bt1"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/anniu"
            android:textSize="20sp" />

</RelativeLayout>

strings.xml

 <?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">SimpleImplicitIntent</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="anniu">選擇</string>

</resources>

運行這程序後，為什麼播放不了mp3?

但是我不用這個程序，就可以播放mp3

不知道代碼哪裡錯了？請大神賜教

最佳回答：

你有沒有嘗試過換一首MP3的音樂？我做這播放器時也出現過，後來換了一首就正常了。我是懷疑你的下載時並不是MP3的格式