我正在Android Studio上制作一个Android应用。而且我出了一个问题。当我单击ImageButton时,应用程序崩溃,而不是转到新活动(Slide1)... 我不知道我在哪里弄错了。
这是我的MainActivity.java
package android.example.ptreinas;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.content.Intent;
public class MainActivity extends AppCompatActivity {
private ImageButton imageButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageButton = (ImageButton) findViewById(R.id.imageButton);
imageButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
openSlide1();
}
});
}
public void openSlide1(){
Intent intent = new Intent(this, Slide1.class);
startActivity(intent);
}
}
和我的activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
tools:context=".MainActivity"
android:background="@color/red">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="400px"
android:layout_gravity="center"
android:src="@drawable/gym" />
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Programa de treinos "
android:layout_gravity="center"
android:textColor="#ffffff"
android:textStyle="bold"
android:textSize="80px"
android:layout_marginTop="50px"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Escolha o programa de treino mais adequado aos seus objetivos."
android:layout_gravity="center"
android:textAlignment="center"
android:layout_marginTop="50px"
android:textSize="50px"
android:textColor="#ffffff"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageButton"
android:src="@drawable/ic_right"
android:background="@drawable/roundcorner"
android:padding="50px"
android:layout_gravity="center"
android:layout_marginTop="150px"
/>
</LinearLayout>
</RelativeLayout>
清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.example.ptreinas">
<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>
</application>
</manifest>
我不知道您是否需要第二个活动(slide1.xml和Slide1.java),让我知道
我需要您的帮助,在此先感谢。
答案 0 :(得分:0)
替换此:
Intent intent = new Intent(this, Slide1.class);
由此:
Intent intent = new Intent(MainActivity.this, Slide1.class);
答案 1 :(得分:0)
在清单中添加第二个活动
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.example.ptreinas">
<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>
//add this line
<activity android:name=".Slide1"/>
</application>