I wrote it in the code below But if you change the shape, the application dies... The error code is E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da D/HostConnection: createUnique: call D/HostConnection: HostConnection::get() New Host Connection established 0xdc7d23c0, tid 16391 D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer ANDROID_EMU_sync_buffer_data GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_async_frame_commands ANDROID_EMU_gles_max_version_3_1 E/eglCodecCommon: GoldfishAddressSpaceHostMemoryAllocator: ioctl_ping failed for device_type=5, ret=-1 D/EGL_emulation: eglMakeCurrent: 0xdc785420: ver 3 1 (tinfo 0xdc783370) D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 1 2 W/ple.sampletoas: Accessing hidden method Landroid/os/Trace;->asyncTraceBegin(JLjava/lang/String;I)V (light greylist, reflection) Accessing hidden method Landroid/os/Trace;->asyncTraceEnd(JLjava/lang/String;I)V (light greylist, reflection) Accessing hidden method Landroid/os/Trace;->traceCounter(JLjava/lang/String;I)V (light greylist, reflection) D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.sampletoast, PID: 16360 java.lang.IllegalStateException: Could not execute method for android:onClick at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:446) at android.view.View.performClick(View.java:6597) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) at android.view.View.performClickInternal(View.java:6574) at android.view.View.access$3100(View.java:778) at android.view.View$PerformClick.run(View.java:25885) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441) at android.view.View.performClick(View.java:6597) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) at android.view.View.performClickInternal(View.java:6574) at android.view.View.access$3100(View.java:778) at android.view.View$PerformClick.run(View.java:25885) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference at com.example.sampletoast.MainActivity.onButton2Clicked(MainActivity.java:58) at java.lang.reflect.Method.invoke(Native Method) at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441) at android.view.View.performClick(View.java:6597) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) at android.view.View.performClickInternal(View.java:6574) at android.view.View.access$3100(View.java:778) at android.view.View$PerformClick.run(View.java:25885) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) I/Process: Sending signal. PID: 16360 SIG: 9
I'd appreciate your help ㅠ<
MainActivity-- package com.example.sampletoast;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;
import com.google.android.material.snackbar.Snackbar;
public class MainActivity extends AppCompatActivity { EditText editText; EditText editText2; Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
editText = findViewById(R.id.editText);
editText2=findViewById(R.id.editText2);
}
public void onButton1Clicked(View v){
try{
Toast toastView = Toast.makeText(this is a "toast message with a new location",
Toast.LENGTH_LONG);
int xOffset = Integer.parseInt(editText.getText().toString());
int yOffset = Integer.parseInt(editText2.getText().toString());
toastView.setGravity(Gravity.TOP|Gravity.TOP,xOffset,yOffset);
toastView.show();
}catch(NumberFormatException e){
e.printStackTrace();
}
}
public void onButton2Clicked(View v){
//Objects XML-defined layouts into memory using LayoutInflater objects
LayoutInflater inflater = getLayoutInflater();
//Get the toast_layout_root ID of the toastborder.xml file in the layout folder
View layout = inflater.inflate(R.layout.toastborder,
(ViewGroup) findViewById(R.id.toast_layout_root));
//Get text view object with id text from View object
TextView text = layout.findViewById(R.id.text);
Toast toast = new Toast(this);
text.setText ("Shaped Toast");
toast.setGravity(Gravity.CENTER, 0, -100);
toast.setDuration(Toast.LENGTH_SHORT);
toast.setView(layout);
toast.show();
}
public void onButton3Clicked(View v){
Snackbar.make(v), Snackbar.LENGTH_LONG).show();
}
}
--toastborder <?xml version="1.0" encoding="utf-8"?>
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/toast"
android:textSize="32sp"
android:padding="20dp"/>
--toast <?xml version="1.0" encoding="utf-8"?>
<stroke
android:color="#ffffff00"
android:width="4dp"/>
<solid
android:color="#ff883300"/>
<padding
android:bottom="20dp"
android:left="20dp"
android:right="20dp"
android:top="20dp"/>
<corners
android:radius="15dp"/>
java.lang.NullPointerException: Attempt to invoke virtual method
'void android.widget.TextView.setText(java.lang.CharSequence)'
on a null object reference at
com.example.sampletoast.MainActivity.onButton2Clicked(MainActivity.java:58)
From here, an exception occurred because the object setText
in the onButton2Clicked
method was a null object. If you look at the code,
TextView text = layout.findViewById(R.id.text);
Toast toast = new Toast(this);
text.setText ("Shaped Toast");
In onButton2Clicked
, setText
is only here, so text
is null. The result of layout.findViewById(R.id.text)
is null.
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