У меня есть приложение для курса, которому нужен прототип. Остальная часть моего кода в порядке, за исключением этой части, где я не могу переключать окна. Надеюсь, ты поможешь мне, потому что эта ошибка сводит меня с ума. Спасибо :)К сожалению, (приложение) остановлено
EDIT: Я добавил третий класс
Это мой четвёртый макет
package com.example.appxercise_techno;
import com.example.appxercise_techno.activity4;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.content.Intent;
public class activity4 extends activity3 implements OnClickListener{
Button heart,leg,abs,chest,back;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.sub4);
heart = (Button)findViewById(R.id.heart);
leg = (Button)findViewById(R.id.leg);
abs = (Button)findViewById(R.id.abs);
chest = (Button)findViewById(R.id.chest);
back = (Button)findViewById(R.id.back);
back.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity4.this, activity3.class);
startActivity(intent);
}
});
heart.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity4.this, activity5.class);
startActivity(intent);
}
});
leg.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity4.this, activity6.class);
startActivity(intent);
}
});
abs.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity4.this, activity7.class);
startActivity(intent);
}
});
chest.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity4.this, activity8.class);
startActivity(intent);
}
});
}
}
This is the layout xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res /android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="36dp"
android:text="Back" />
<TextView
android:id="@+id/large"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="25dp"
android:text="Side Quest Trainings"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/abs"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/heart"
android:layout_alignBottom="@+id/heart"
android:layout_marginLeft="14dp"
android:layout_toRightOf="@+id/back"
android:text="Cores" />
<Button
android:id="@+id/heart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/large"
android:layout_below="@+id/large"
android:layout_marginTop="68dp"
android:text="Cardio" />
<Button
android:id="@+id/leg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/chest"
android:layout_alignBottom="@+id/chest"
android:layout_alignLeft="@+id/abs"
android:text="Lower" />
<Button
android:id="@+id/chest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/back"
android:layout_marginBottom="54dp"
android:layout_toLeftOf="@+id/back"
android:text="Upper" />
</RelativeLayout>
И это ошибка
03-07 23: 09: 21,010: E/AndroidRuntime (1192): FATAL EXCEPTION: main 03-07 23: 09: 21.010: E/AndroidRuntime (1192): Процесс: com.example.appxercise_techno, PID: 1192 03-07 23: 09: 21.010: E/AndroidRuntime (1192): java.lang.RuntimeException: невозможно запустить активность ComponentInfo {c om.example.appxercise_techno/com.example.appxercise_techno.activity4}: java.lang.NullPointerException 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.app.ActivityThread.performLaunchActivity (ActivityThread.java: 2176) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2226) 03-07 23: 09: 21.010: E/AndroidRuntime (1192) : at android.app.ActivityThread.access $ 700 (ActivityThread.java:135) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1397) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.os.Handler.dispatchMessage (Handler.java:102) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): на android.os.Looper.loop (Looper.java:137) 03-07 23:09: 21.010: E/AndroidRuntime (1192): at android.app.ActivityThread.main (ActivityThread.java:4998) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at java.lang.reflect.Method. invokeNative (Native Method) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at java.lang.reflect.Method.invoke (Method.java:515) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:777) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at com.android.internal .os.ZygoteInit.main (ZygoteInit.java:593) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at dalvik.system.NativeStart.main (родной метод) 03-07 23:09: 21.010: E/AndroidRuntime (1192): вызвано: java.lang.NullPointerException 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at com.example.appxerc ise_techno.activity2.onCreate (activity2.java:27) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at com.example.appxercise_techno.activity3.onCreate (activity3.java:19) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at com.example.appxercise_techno.activity4.onCreate (activity4.java:16) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): на android. app.Activity.performCreate (Activity.java:5243) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1087) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2140) 03-07 23: 09: 21.010: E/AndroidRuntime (1192): ... 11 далее
This is the third activity
package com.example.appxercise_techno;
import com.example.appxercise_techno.activity3;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.content.Intent;
public class activity3 extends activity2 implements OnClickListener{
TextView out1, out2, out3, out4, out5, out6, big;
Button quest;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.sub3);
out1 = (TextView)findViewById(R.id.out1);
out2 = (TextView)findViewById(R.id.out2);
out3 = (TextView)findViewById(R.id.out3);
out4 = (TextView)findViewById(R.id.out4);
out5 = (TextView)findViewById(R.id.out5);
out6 = (TextView)findViewById(R.id.out6);
big = (TextView)findViewById(R.id.big);
quest = (Button)findViewById(R.id.quest);
Bundle extras = getIntent().getExtras();
String name = extras.getString("name1");
Double result = extras.getDouble("result");
big.setText("Your Routine " +name);
if (result >= 15 && result < 16){
out1.setText("10 Pushups");
out2.setText("10 Situps");
out3.setText("10 Seconds Plank");
out4.setText("5 Squat Thrusts");
out5.setText("10 Pullups");
out6.setText("2 Sets. Rest between sets up to 2 mins.");
}
else if (result >= 16 && result < 18.5){
out1.setText("5 Minutes Running/Walking");
out2.setText("20 Pushups");
out3.setText("20 Seconds Plank");
out4.setText("20 Lunges");
out5.setText("30 Shadowbox Punches");
out6.setText("3 Sets. Rest between sets up to 3 mins.");
}
else if (result >= 18.5 && result < 25){
out1.setText("20 Pushups");
out2.setText("20 Seconds Plank");
out3.setText("20 Situps");
out4.setText("12 Flutter Kicks");
out5.setText("15 Squats");
out6.setText("5 Sets. Rest between sets up to 2 mins.");
}
else if (result >= 25 && result < 30){
out1.setText("20 Pushups");
out2.setText("10 Seconds Plank");
out3.setText("50 Shadowbox Punches");
out4.setText("60 Seconds One Leg Stand");
out5.setText("20 Pullups");
out6.setText("3 Sets. Rest between sets up to 2 mins.");
}
else if (result >= 30 && result < 35){
out1.setText("3 Minutes Sprint");
out2.setText("10 Jumping Jacks");
out3.setText("10 Squats");
out4.setText("5 Second Plank");
out5.setText("20 Toe Reaches");
out6.setText("3 Sets. Rest bewteen sets up to 3 mins. ");
}
else if (result >= 35){
out1.setText("3 Minutes Sprint");
out2.setText("10 Jumping Jacks");
out3.setText("10 Knee Touches");
out4.setText("10 Toe Reaches");
out5.setText("10 Climbers");
out6.setText("2 Sets. Rest bewteen sets up to 3 mins.");
}
quest.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(activity3.this, activity4.class);
startActivity(intent);
}
});
}
}
Является ли activity3 подклассов активность? – Makketronix
да, это подкласс. –