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我遵循这tutorial和我遵循所有的步骤，但当我在我的设备上启动应用程序它说它崩溃了。所以我想首先做MainActivity显示，然后如果我点击一个操作栏菜单，它会加载第二个活动（upload.java）蚂蚁它会显示upload_layout.I'm训练使Android的应用程序，所以我不好编程;）Android应用程序崩溃与两个活动
这里我的代码： MainActivity.java
package com.example.tosseapp.app;
import android.content.Intent;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.*;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.IOException;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, 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);
}
public void tosse1(View v) {
Button one = (Button)this.findViewById(R.id.button1);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.toxxe);
one.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void tosse2(View v) {
Button two = (Button)this.findViewById(R.id.button2);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.tozze);
two.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void tosse3(View v) {
Button two = (Button)this.findViewById(R.id.button3);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.tossesei);
two.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void tosse4(View v) {
Button two = (Button)this.findViewById(R.id.button4);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.todde);
two.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void tosse5(View v) {
Button two = (Button)this.findViewById(R.id.button5);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.tossequattro);
two.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void tosse6(View v) {
Button two = (Button)this.findViewById(R.id.button6);
final MediaPlayer mp = MediaPlayer.create(this, R.raw.tossecinque);
two.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Resume the music player
mp.start();
}
});
}
public void upload(View view) {
Intent intent = new Intent(this, upload.class);
startActivity(intent);
}
}
upload.java：
package com.example.tosseapp.app;
import android.content.Intent;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class upload extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.upload_layout);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.upload, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
}
AndroidManifest：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.tosseapp.app" >
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<activity
android:name="com.example.tosseapp.app.upload"
android:label="@string/app_name"
android:parentActivityName=".MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.tosseapp.app.MainActivity" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
的main.xml（菜单）
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.tosseapp.app.MainActivity" >
<item android:id="@+id/action_settings"
android:title="@string/action_settings"
android:onClick="upload"
android:orderInCategory="100"
app:showAsAction="never" />
</menu>
可以从您的logcat发布错误？ – Carbongixxer
对不起，什么是logcat？ – xballox
logcat显示运行时错误，警告等 –