Question

所以我希望能够从主菜单中启动多个活动。所有按钮都有android：onClick =＆＃34; onClick＆＃34;在每个单独的按钮。但是，当我试图让按钮执行从单击启动特定活动的意图时，没有任何反应。如何启用按钮以启动不同的活动？这是我的代码：

import com.customerautomotivenetwork.RssFeed.VehicleRecall;
import com.customerautomotivenetwork.vehicleinfo.VehicleInfo;
import com.customerautomotivenetwork.MileageKeeper;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;


 public class MainActivity extends Activity implements View.OnClickListener {

   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      Button toMileageKeeeper = (Button) findViewById(R.id.toMileageKeeper);
      toMileageKeeeper.setOnClickListener(this);

      Button toVehicleInfo = (Button) findViewById(R.id.toVehicleInfo);
      toVehicleInfo.setOnClickListener(this);

      Button toVehicleRecall = (Button) findViewById(R.id.toVehicleRecall);
      toVehicleRecall.setOnClickListener(this);


//Allows the user to pick which button to pick in order to pick which activity
   @Override
   public void onClick(View v) {

      switch (v.getId()) {
      case R.id.toMileageKeeper:
      startActivity(new Intent(MainActivity.this,MileageKeeper.class));
      break;
      case R.id.toVehicleInfo:
      startActivity(new Intent(MainActivity.this,VehicleInfo.class));
      break;
      case R.id.toVehicleRecall:
      startActivity(new Intent(MainActivity.this,VehicleRecall.class));
      break;
     }

   };
}

现在我已经删除了额外的onClick，按钮确实尝试点击下一个活动。但是只有前程万里（MileageKeeper）按钮才能工作并打开前程万里（Mileage Keeper）活动。其他按钮会导致应用关闭。所以我猜测我把意图放在了Manifest中。所以这是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.customerautomotivenetwork"
   android:versionCode="1"
   android:versionName="1.0" >

   <uses-sdk
    android:minSdkVersion="13"
    android:targetSdkVersion="20" />

   <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >      
    <activity
        android:name=".MainActivity"
        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=".MileageKeeper"
        android:label="Mileage Keeper">
    </activity>
    <activity
        android:name=".VehicleInfo"
        android:label="Vehicle Info">
        <intent-filter>
            <action android:name="com.customerautomotivenetwork.vehicleinfo.VehicleInfo" />

            <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
      </activity>
      <activity
        android:name=".VehicleRecall"
        android:label="Vehicle Recall">
         <intent-filter>
            <action android:name="com.customerautomotivenetwork.RssFeed.VehicleRecall" />

            <category android:name="android.intent.category.DEFAULT"/>
           </intent-filter>
         </activity>
      </application>

   </manifest>

Answer 1

从xml中删除android:onClick="onClick"，它将起作用。

如何启用多个按钮以启动特定活动

1 个答案: