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I keep getting a runtime error when launching my activity and it says android.widget.textview cannot be cast to android.widget.button?
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:ignore="HardcodedText" >
<TextView
android:id="@+id/textViewName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="false"
android:layout_alignParentTop="false"
android:text="Name:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewLevel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textViewName"
android:text="Level:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewClass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="false"
android:layout_below="@+id/textViewLevel"
android:text="Class:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textViewClass"
android:layout_alignBottom="@+id/textViewClass"
android:layout_centerHorizontal="true"
android:text="Title:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewXP"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewTitle"
android:layout_alignLeft="@+id/textViewTitle"
android:text="XP:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewGold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textViewXP"
android:layout_alignParentTop="true"
android:text="Gold:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewLineBreak"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textViewClass"
android:text="________________________________________"
android:textAppearance="?android:attr/textAppearanceMedium"
android:visibility="invisible" />
<TextView
android:id="@+id/textViewGoldValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/textViewGold"
android:text="0"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/textViewTitle"
android:text="Stats" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button3"
android:layout_alignParentLeft="true"
android:layout_marginBottom="20dp"
android:layout_toLeftOf="@+id/textViewTitle"
android:text="Equipment" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button2"
android:layout_alignParentLeft="true"
android:layout_alignRight="@+id/button2"
android:layout_marginBottom="22dp"
android:text="Inventory" />
<Button
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_alignLeft="@+id/button4"
android:layout_alignParentRight="true"
android:text="Shop" />
<Button
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/button2"
android:layout_toRightOf="@+id/textViewXP"
android:text="Class Training" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button5"
android:layout_alignParentRight="true"
android:layout_below="@+id/button1"
android:text="Crafting" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textViewLineBreak"
android:text="HP:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewStrTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewLineBreak"
android:layout_alignLeft="@+id/textViewGoldValue"
android:text="N/A"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewXPValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textViewGoldValue"
android:layout_below="@+id/textViewGoldValue"
android:text="0"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewLevelValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewClass"
android:layout_toRightOf="@+id/textViewName"
android:text="1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/TextViewStrClass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewLineBreak"
android:layout_alignLeft="@+id/textViewLevelValue"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewRace"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textViewClass"
android:text="Race:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView4"
android:layout_alignBottom="@+id/textView4"
android:layout_toLeftOf="@+id/TextViewStrClass"
android:text="10"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Spinner
android:id="@+id/spinnerMonsters"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView4"
android:layout_marginTop="50dp"
android:layout_toLeftOf="@+id/btnBattle"
android:entries="@array/Monsters"
android:prompt="@string/MonsterPrompt" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/spinnerMonsters"
android:layout_alignRight="@+id/textViewXPValue"
android:text="10"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="@+id/btnBattle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/spinnerMonsters"
android:text="Battle!" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewStrTitle"
android:layout_alignRight="@+id/spinnerMonsters"
android:layout_marginRight="14dp"
android:text="/"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewXpNextLevel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textViewLevel"
android:layout_alignBottom="@+id/textViewLevel"
android:layout_alignLeft="@+id/btnBattle"
android:text="100"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textViewBattleResults"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/spinnerMonsters"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewStrRace"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_toRightOf="@+id/textViewClass"
android:text="l"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewStrAlliance"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/textView2"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/textViewStrTitle"
android:text="Small Text"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewAlliance"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textViewTitle"
android:layout_toRightOf="@+id/button1"
android:text="Alliance:"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textViewAlliance"
android:layout_below="@+id/textViewLineBreak"
android:text="MP:"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
What is happening here? I've gone through it a few times and can't find anything
Edit:
09-17 18:28:51.485: E/AndroidRuntime(724): FATAL EXCEPTION: main
09-17 18:28:51.485: E/AndroidRuntime(724): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.intent_buttontests/com.example.intent_buttontests.PlayScreen}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread.access$600(ActivityThread.java:123)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.os.Handler.dispatchMessage(Handler.java:99)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.os.Looper.loop(Looper.java:137)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread.main(ActivityThread.java:4424)
09-17 18:28:51.485: E/AndroidRuntime(724): at java.lang.reflect.Method.invokeNative(Native Method)
09-17 18:28:51.485: E/AndroidRuntime(724): at java.lang.reflect.Method.invoke(Method.java:511)
09-17 18:28:51.485: E/AndroidRuntime(724): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-17 18:28:51.485: E/AndroidRuntime(724): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-17 18:28:51.485: E/AndroidRuntime(724): at dalvik.system.NativeStart.main(Native Method)
09-17 18:28:51.485: E/AndroidRuntime(724): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
09-17 18:28:51.485: E/AndroidRuntime(724): at com.example.intent_buttontests.PlayScreen.onCreate(PlayScreen.java:110)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.Activity.performCreate(Activity.java:4465)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
09-17 18:28:51.485: E/AndroidRuntime(724): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
09-17 18:28:51.485: E/AndroidRuntime(724): ... 11 more
854
I added the logcat. But i have no idea what is happening
This is the important information in your LogCat file:
Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
at com.example.intent_buttontests.PlayScreen.onCreate(PlayScreen.java:110)
You read the error correctly, it is a ClassCastException. The lines below Caused by... tell you where the error was thrown, which is in PlayScreen.onCreate() on line 110. As best I can tell line 110 is:
Button btnBattle = (Button) findViewById(R.id.btnBattle);
But this line is fine and the XML for btnBattle looks fine too...
I ran your Activity with your layout myself and didn't get any errors. Have you cleaned your project? Often this will remove these "phantom" errors. (In Eclipse, Project -> Clean...)
I do have one suggestion, you have a lot of Buttons that do similar tasks. You can do the same actions with much less code if you use the XML onClick attribute. First create a method (call it launchClick()) in your Activity like so:
public void launchClick(View v) {
Intent intent;
switch(v.getId()) {
case R.id.button1:
intent = new Intent(PlayScreen.this, Inventory.class);
break;
case R.id.button2:
intent = new Intent(PlayScreen.this, Equipment.class);
break;
// etc, etc
}
startActivityForResult(intent, 0);
};
And add the attribute android:onClick to every Button that you should have this behavior in play_screen.xml:
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/textViewTitle"
android:onClick="launchClick"
android:text="Stats" />
Hope that helps!
166
Project -> Clean can help you.
29
you are trying to cast TextView to Button.
for TextView do this :
TextView tv = (TextView)findviewById(R.id.your textviewid present in xml layout file);
for Button :
Button btn1 = (Button)findviewById(R.id.your buttonid present in xml layout file);
In Eclipse go to Project > Clean, choose your project, and it's all... Your app will run normally...
1
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