Question

我知道很多人都提出了同样的问题，但我读了所有这些问题而且我找不到我的错误。

与所有其他问题一样，我有2项活动。主要创建和意图并捆绑一些信息，第二个接收它。

错误日志

android.content.ActivityNotFoundException: Unable to find explicit activity class 
{/com.example.tkota.testintent.MapActivity};
have you declared this activity in your AndroidManifest.xml?

MainActivity：

package com.example.tkota.testintent;

import android.app.ListActivity;
import android.content.Intent;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.view.View;
import android.os.Bundle;

public class MainActivity extends ListActivity{
String[] strings= {"Test 1","Test 2"};
Intent intent = new Intent(this,MapActivity.class);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);
    setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, strings));
}

public void onListItemClick(ListView parent, View v, int position, long id){
    Bundle bundle = new Bundle();
    bundle.putString("string", strings[position]);
    intent.putExtras(bundle);
    startActivity(intent);
    }
}

MapActivity：

package com.example.tkota.testintent;

import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;

public class MapActivity extends Activity{
Button actualizar;
EditText txtDireccion;
WebView myWebView;
public String direccion = new String("");
public String urlDefault = new String("http://maps.google.com/maps?q=");

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map);
    actualizar = (Button) this.findViewById(R.id.btnActualizar);
    txtDireccion = (EditText) this.findViewById(R.id.txtDireccion);
    myWebView = (WebView) this.findViewById(R.id.webView);

    Bundle bundle = this.getIntent().getExtras();
    direccion = bundle.getString("string");
    txtDireccion.setText(direccion);
    myWebView.loadUrl(urlDefault+direccion);

    }
}

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.tkota.testintent" >
    <application
        android:allowBackup="true"
        android:icon="@mipmap/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=".MapActivity"
            android:label="TestIntent"/>
    </application>

</manifest>

我阅读了这些答案https://stackoverflow.com/a/9552169/2257448并更新了所有Android API和Eclipse。问题还在继续，所以我在Android Studio上创建了相同的应用程序，但仍然没有解决方案。

我也尝试将完整的包信息放在清单上。

<activity
   android:name="com.example.tkota.testintent.MapActivity"
   android:label="TestIntent"/>

有什么想法吗？

修改

正如Karan Mer在评论中写的那样，通过在 onListItemClick

中创建意图来解决问题

所以代码就是这些：

package com.example.tkota.testintent;

import android.app.ListActivity;
import android.content.Intent;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.view.View;
import android.os.Bundle;

public class MainActivity extends ListActivity{
String[] strings= {"Test 1","Test 2"};
Intent intent = new Intent(this,MapActivity.class);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);
    setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, strings));
}

public void onListItemClick(ListView parent, View v, int position, long id){
    Intent intent = new Intent(MainActivity.this,MapActivity.class);
    Bundle bundle = new Bundle();
    bundle.putString("string", strings[position]);
    intent.putExtras(bundle);
    startActivity(intent);
    }
}

Answer 1

尝试在listonitemclick中创建你的意图，如下所示

public void onListItemClick(ListView parent, View v, int position, long id){ 

    Bundle bundle = new Bundle(); 
    intent = new Intent(getapplicationcontext(),MapActivity.class); 
    bundle.putString("string", strings[position]); intent.putExtras(bundle);
    startActivity(intent);
}

Answer 2

正如Karan Mer在评论中写的那样，通过在 onListItemClick

中创建意图来解决问题

所以代码就是这些：

package com.example.tkota.testintent;

import android.app.ListActivity;
import android.content.Intent;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.view.View;
import android.os.Bundle;

public class MainActivity extends ListActivity{
String[] strings= {"Test 1","Test 2"};
Intent intent = new Intent(this,MapActivity.class);
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.activity_main);
    setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, strings));
}

public void onListItemClick(ListView parent, View v, int position, long id){
    Intent intent = new Intent(MainActivity.this,MapActivity.class);
    Bundle bundle = new Bundle();
    bundle.putString("string", strings[position]);
    intent.putExtras(bundle);
    startActivity(intent);
    }
}

Answer 3

在清单文件中注册您的第二个活动，它将起作用

<activity
        android:name="com.example.tkota.testintent.MapActivity"
        android:label="TestIntent"/>

这就是你需要调用这样的第二个活动

public void onListItemClick(ListView parent, View v, int position, long id){
    Intent intent = new Intent(MainActivity.this,MapActivity.class);
    Bundle bundle = new Bundle();
    bundle.putString("string", strings[position]);
    intent.putExtras(bundle);
    startActivity(intent);
    }
}

Android - 无法找到显式活动类

3 个答案: