我有一个基本的Android应用程序设置了两个活动。问题是,第一个打开,并永远停留在那里,第二个不会启动。Android,第二次活动不会启动
任何人都可以说出了什么问题吗?
MainActivity.java
package com.desecrationstudios.firstapp;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
int counter;
Button add, sub;
TextView display;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.linear);
counter = 0;
add = (Button) findViewById(R.id.bAdd);
sub = (Button) findViewById(R.id.bSub);
display = (TextView) findViewById(R.id.tvDisplay);
add.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
counter++;
display.setText("Your total is " + counter);
}
});
sub.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
counter--;
display.setText("Your total is " + counter);
}
});
}
@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;
}
}
Splash.java:
package com.desecrationstudios.firstapp;
import android.app.Activity;
import android.os.Bundle;
public class Splash extends Activity{
@Override
protected void onCreate(Bundle splash) {
super.onCreate(splash);
setContentView(R.layout.splash);
}
}
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.desecrationstudios.firstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Splash"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
</activity>
</application>
</manifest>
谢谢!
这样做会给我两个错误,一个是“构造函数Intent(Splash,MainActivity)未定义”,另一个“不包含MainActivity类型的封闭实例可以在范围内访问” –
请参阅我的答案use'Intent intent = new Intent (this,MainActivity.class);'而不是'new Intent(Splash,MainActivity)' –
这使得它工作,但现在MainActivity在Splash之前启动。 –