Android.content.res.Resources $ NotFoundException: String Resource Identifier Fatal Exception in Main

Question

I am trying to create a simple program that extracts a small random number and displays it to the user in text form. After finally getting a random number to generate (I think) the program throws a fatal exception whenever I run. There are no errors in the code, but I am a complete beginner, and I start just so that I can learn. A few hours later I asked for help. I am almost sure that my fragment of random numbers is in the wrong place, I just don’t know where to put it. Everywhere I tried, I get the same error.

This is .java

package com.eai.vgp; import java.util.Random; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.TextView; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } Random pp = new Random(); int a1 = pp.nextInt(10); TextView tv = (TextView)findViewById(R.id.tv);{ tv.setText(a1);} } 

XML

 <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" tools:context=".MainActivity" > <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" /> </RelativeLayout> 

Logcat

 03-03 16:34:25.313: I/Process(740): Sending signal. PID: 740 SIG: 9 03-03 16:35:02.212: E/Trace(806): error opening trace file: No such file or directory (2) 03-03 16:35:02.802: W/ResourceType(806): No package identifier when getting value for resource number 0x00000001 03-03 16:35:02.813: D/AndroidRuntime(806): Shutting down VM 03-03 16:35:02.813: W/dalvikvm(806): threadid=1: thread exiting with uncaught exception (group=0x40a13300) 03-03 16:35:02.833: E/AndroidRuntime(806): FATAL EXCEPTION: main 03-03 16:35:02.833: E/AndroidRuntime(806): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.eai.vgp/com.eai.vgp.MainActivity}: android.content.res.Resources$NotFoundException: String resource ID #0x1 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.ActivityThread.access$600(ActivityThread.java:130) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.os.Handler.dispatchMessage(Handler.java:99) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.os.Looper.loop(Looper.java:137) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.ActivityThread.main(ActivityThread.java:4745) 03-03 16:35:02.833: E/AndroidRuntime(806): at java.lang.reflect.Method.invokeNative(Native Method) 03-03 16:35:02.833: E/AndroidRuntime(806): at java.lang.reflect.Method.invoke(Method.java:511) 03-03 16:35:02.833: E/AndroidRuntime(806): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 03-03 16:35:02.833: E/AndroidRuntime(806): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 03-03 16:35:02.833: E/AndroidRuntime(806): at dalvik.system.NativeStart.main(Native Method) 03-03 16:35:02.833: E/AndroidRuntime(806): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x1 03-03 16:35:02.833: E/AndroidRuntime(806): at android.content.res.Resources.getText(Resources.java:229) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.widget.TextView.setText(TextView.java:3620) 03-03 16:35:02.833: E/AndroidRuntime(806): at com.eai.vgp.MainActivity.onCreate(MainActivity.java:22) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.Activity.performCreate(Activity.java:5008) 03-03 16:35:02.833: E/AndroidRuntime(806): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 03-03 16:35:02.833: E/AndroidRuntime(806): atandroid.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 03-03 16:35:02.833: E/AndroidRuntime(806): ... 11 more 03-03 16:35:05.113: I/Process(806): Sending signal. PID: 806 SIG: 9 

Answer 1

Move

 Random pp = new Random(); int a1 = pp.nextInt(10); TextView tv = (TextView)findViewById(R.id.tv); tv.setText(a1); 

Inside onCreate() and change tv.setText(a1); on tv.setText(String.valueOf(a1)); :

 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Random pp = new Random(); int a1 = pp.nextInt(10); TextView tv = (TextView)findViewById(R.id.tv); tv.setText(String.valueOf(a1)); } 

First problem: findViewById() was called before onCreate() , which would cause NPE.

The second problem: passing int directly to the TextView calls an overloaded method that looks for a String resource (from R.string ). Therefore, we want to use String.valueOf() to force the overloaded String method.

Answer 2

You tried to do a.setText (a1). a1 is an int value, but setText () requires a string value. For this reason, you need to use String.valueOf (a1) to pass the value of a1 as a String, and not as an int in a.setText (), like so:

a.setText(String.valueOf(a1))

it was the exact solution to the problem with my case.

Answer 3

 tv.setText( a1 + " "); 

This will solve your problem.

Answer 4

You are trying to set the int value to a TextView to get this problem. To solve this problem, try one of the options.

option 1:

 tv.setText(no+""); 

Option2:

 tv.setText(String.valueOf(no)); 

Answer 5

Another possible solution:

 tv.setText(Integer.toString(a1)); // where a1 - int value 

Answer 6

This can always happen in a DataBinding. Try to avoid adding logic to your bindings, including adding an empty string. You can make your own adapter and use it several times.

 @BindingAdapter("numericText") fun numericText(textView: TextView, value: Number?) { value?.let { textView.text = value.toString() } } 

<TextView app:numericText="@{list.size()}".../>