Question

我在主屏幕上有两个按钮。当我单击悲伤的那一个时，它可以工作，但是当我单击快乐的那一个时，它不起作用（“ Feliz”按钮）。我已经尝试了一切，但实际上我不知道在哪里放置代码或放置什么。这是我所拥有的：

package com.example.clara;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity implements View.OnClickListener  {

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

        Button btn1 = findViewById(R.id.btn1);
        Button btn2 = findViewById(R.id.btn2);

        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {



        switch(v.getId()){
            case R.id.btn1:
                Intent intent = new Intent(this,ThirdActivity.class);
                startActivity(intent);
                Toast.makeText(this, "Yaaay",Toast.LENGTH_SHORT).show();
                break;
            case R.id.btn2:
                Intent tristeza = new Intent(this,SecondActivity.class);
                startActivity(tristeza);
                Toast.makeText(this, "Noooo",Toast.LENGTH_SHORT).show();
                break;



        }
    }
}

我删除了方法，但仍然无法正常工作。这是此应用的清单：

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".ThirdActivity"></activity>
        <activity android:name=".SecondActivity" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:background="@drawable/claralinda">


    <TextView
        android:id="@+id/text2"
        android:layout_width="95dp"
        android:layout_height="46dp"
        android:layout_marginStart="150dp"
        android:layout_marginLeft="150dp"
        android:layout_marginTop="300dp"
        android:layout_marginEnd="150dp"
        android:layout_marginRight="150dp"
        android:background="#0c3d46"
        android:text="@string/Hola"
        android:textColor="#c1f1ab"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <Button
        android:id="@+id/btn1"
        android:layout_width="125dp"
        android:layout_height="55dp"
        android:layout_marginStart="32dp"
        android:layout_marginLeft="32dp"
        android:layout_marginTop="190dp"
        android:layout_marginEnd="220dp"
        android:layout_marginRight="220dp"
        android:layout_marginBottom="140dp"
        android:background="#0c3d46"
        android:text="@string/second_page"
        android:textColor="#71cfae"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.101"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/text2" />

    <Button
        android:id="@+id/btn2"
        android:layout_width="125dp"
        android:layout_height="55dp"
        android:layout_marginStart="220dp"
        android:layout_marginLeft="220dp"
        android:layout_marginTop="190dp"
        android:layout_marginEnd="32dp"
        android:layout_marginRight="32dp"
        android:layout_marginBottom="140dp"
        android:background="#0c3d46"
        android:text="@string/second_page_sad"
        android:textColor="#71cfae"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.902"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/text2" />


</android.support.constraint.ConstraintLayout>

Answer 1

尝试一下

<application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
    <activity android:name=".ThirdActivity"></activity>
    <activity android:name=".SecondActivity"></activity>
</application>

如何使按钮1带我进行第三项活动？

1 个答案: