任何人都可以指导我,我正在尝试创建一个具有启动和主菜单活动的简单应用程序。
我已经实现了这两个活动,每当我运行模拟器时,我都可以看到弹出窗口,但它永远不会进入主菜单活动。
我尝试更改清单中的XML文件,如下所示:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.book" android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<application android:icon="@drawable/ic_launcher"
android:label="@string/app_name" android:name=".activity.StartApp">
<activity
android:name=".activity.MainMenuApp"
android:label="@string/app_name">
</activity>
<activity android:name=".activity.SplashApp"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
有人可以建议为什么主菜单没有出现吗?
感谢。
编辑:SplashApp.java
import com.book.R;
public class SplashApp extends Activity {
private DBAdapter mDBAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
}
@Override
protected void onStart() {
super.onStart();
mDBAdapter = new DBAdapter(getApplicationContext());
try{
...
…. int sec = 1;
new Handler().postDelayed(new Runnable(){
public void run(){
Intent intent = new Intent(SplashApp.this, MainMenuApp.class);
startActivity(intent);
finish();
}
}, sec * 1000);
}catch (Exception e){
e.printStackTrace();
}
}
}
我发现问题可能出现在我的清单文件中:
package="com.book"
我现在能够加载启动活动,但它不会进入主菜单页面?
答案 0 :(得分:0)
如果主菜单活动实际上是Activity
,则应在androidManifest.xml
文件中注明(有或没有意图过滤器):
...
<activity android:name=".activity.MainMenu"
android:label="@string/main_menu">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
...
如果您在SplashApp
活动中执行初始化任务,并且应用程序的主要功能位于MainActivity
,您会发现DEFAULT
意图过滤器非常有用。
edit1:从清单中的android:name
标记中删除application
属性
edit2:使用SplashApp.this.finish()
而非finish()
,因为 this 指的是处理程序。
SplashApp.java:
package com.book.activity;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import com.book.R;
public class SplashApp extends Activity
{
private DBAdapter mDBAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
}
@Override
protected void onStart()
{
super.onStart();
mDBAdapter = new DBAdapter(getApplicationContext());
try
{
ArrayList<BookBean> books = mDBAdapter.getAllBooks();
if (books == null)
{
InputStream instream = getAssets().open("bookdata.txt");
BufferedReader bf = new BufferedReader(new InputStreamReader(instream));
String line;
while ((line = bf.readLine()) != null)
{
String arr[] = line.split("***");
for (int i = 0; i < arr.length; i++)
{
String temp[] = arr[i].split("*");
BookBean book = new BookBean();
book.setDescription((temp[0]));
book.setName(temp[1]);
book.setYearPublished(temp[2]);
mDBAdapter.insertBook(book);
}
}
}
final int sec = 1;
new Handler().postDelayed(new Runnable()
{
public void run()
{
Intent intent = new Intent(SplashApp.this, MainMenuApp.class);
startActivity(intent);
SplashApp.this.finish();
}
}, sec * 1000);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
<强>的AndroidManifest.xml:强>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.book" android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<application android:icon="@drawable/ic_launcher"
android:label="@string/app_name">
<activity android:name=".activity.MainMenuApp"
android:label="@string/app_name" />
<activity android:name=".activity.SplashApp"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>