[JAVA] Android Studio memo that you want to display Toast characters in large size

Press the button to switch the three images in order I made an app that gives different Toast texts.

package com.example.rswitch;

import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View;

import android.widget.ImageView; import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

// boolean Boolean type that can contain true or false // isShowing Determine if it is displayed on the screen

// Let the computer determine that the images re1 and re2 are displayed on the screen boolean re1IsShowing = true; boolean re2IsShowing = true;

public void fade (View view) {

// Associate Java variables re1, re2, re3 with xml id respectively // Animation will not be executed unless linked ImageView re1 = findViewById(R.id.re1); ImageView re2 = findViewById(R.id.re2); ImageView re3 = findViewById(R.id.re3);

    if(re1IsShowing) {

//swichボタン押した後、画像re1は表示されていないと判定させる re1IsShowing = false;

        re1.animate().alpha(0).setDuration(1000);
        re2.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Cute?", Toast.LENGTH_LONG) .show ();

    } else if(re2IsShowing) {

//swichボタン押した後、画像re2は表示されていないと判定させる re2IsShowing = false;

        re2.animate().alpha(0).setDuration(1000);
        re3.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Play ~", Toast.LENGTH_LONG) .show ();

    } else {

        re1IsShowing = true;
        re2IsShowing = true;


        re3.animate().alpha(0).setDuration(1000);
        re1.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Do you look good?", Toast.LENGTH_LONG) .show (); }

}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);





}

}

However, the text is small, so I want to make it larger. Refer to the article that appeared on the net https://blog.fujiu.jp/2013/11/14-android-toast.html

Try changing text and toast

package com.example.rswitchtoastarrange;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle; import android.view.View;

import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

// boolean Boolean type that can contain true or false // isShowing Determine if it is displayed on the screen

// Let the computer determine that the images re1 and re2 are displayed on the screen boolean re1IsShowing = true; boolean re2IsShowing = true;

TextView text = new TextView(getApplicationContext());



public void fade (View view) {

// Associate Java variables re1, re2, re3 with xml id respectively // Animation will not be executed unless linked ImageView re1 = findViewById(R.id.re1); ImageView re2 = findViewById(R.id.re2); ImageView re3 = findViewById(R.id.re3);

    if(re1IsShowing) {

//swichボタン押した後、画像re1は表示されていないと判定させる re1IsShowing = false;

        re1.animate().alpha(0).setDuration(1000);
        re2.animate().alpha(1).setDuration(1000);

text.setText ("Cute?"); text.setTextSize(30);

        Toast toast = new Toast(getApplicationContext());
        toast.setView(text);
        toast.setDuration(Toast.LENGTH_LONG);
        toast.show();


    } else if(re2IsShowing) {

//swichボタン押した後、画像re2は表示されていないと判定させる re2IsShowing = false;

        re2.animate().alpha(0).setDuration(1000);
        re3.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Play ~", Toast.LENGTH_LONG) .show ();

    } else {

        re1IsShowing = true;
        re2IsShowing = true;


        re3.animate().alpha(0).setDuration(1000);
        re1.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Do you look good?", Toast.LENGTH_LONG) .show (); }

}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);





}

}

If you run as, the app will drop immediately after starting the app on the emulator even though no error occurs.

Looking at Logcat,

2020-01-24 20:10:35.166 1835-1835/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument 2020-01-24 20:10:35.167 1835-1835/? E/netmgr: WifiForwarder unable to open QEMU pipe: Invalid argument

I looked it up, but I'm not sure.

Copy and paste the reference article as it is

package com.example.toastbig;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color; import android.graphics.Typeface; import android.os.Bundle; import android.view.View; import android.widget.TextView; import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);




    TextView text = new TextView(getApplicationContext());

//Toastに表示する文字 text.setText ("\ large red text /"); //フォントの種類 text.setTypeface(Typeface.SANS_SERIF); //フォントの大きさ text.setTextSize(30); //フォントの色 text.setTextColor(Color.RED); //文字の背景色(ARGB) text.setBackgroundColor(0x88dcdcdc);

//Toastの表示 Toast toast = new Toast(getApplicationContext()); toast.setView(text); toast.setDuration(Toast.LENGTH_LONG); toast.show(); }

}

Then \ large red letters /

Is displayed properly.

public class MainActivity extends AppCompatActivity Not in

protected void onCreate(Bundle savedInstanceState) { I wondered if I had to put the code inside,

Below TextView protected void onCreate(Bundle savedInstanceState) { In setContentView(R.layout.activity_main);

When I move it to public void fade (View view) To view cannot find symbol and An error has occurred.

package com.example.rswitchtoastarrange;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle; import android.view.View;

import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

// boolean Boolean type that can contain true or false // isShowing Determine if it is displayed on the screen

// Let the computer determine that the images re1 and re2 are displayed on the screen boolean re1IsShowing = true; boolean re2IsShowing = true;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView text = new TextView(getApplicationContext());



    
    public void fade (View view) {

// Associate Java variables re1, re2, re3 with xml id respectively // Animation will not be executed unless linked ImageView re1 = findViewById(R.id.re1); ImageView re2 = findViewById(R.id.re2); ImageView re3 = findViewById(R.id.re3);

        if(re1IsShowing) {

//swichボタン押した後、画像re1は表示されていないと判定させる re1IsShowing = false;

            re1.animate().alpha(0).setDuration(1000);
            re2.animate().alpha(1).setDuration(1000);

text.setText ("Cute?"); text.setTextSize(30);

            Toast toast = new Toast(getApplicationContext());
            toast.setView(text);
            toast.setDuration(Toast.LENGTH_LONG);
            toast.show();


        } else if(re2IsShowing) {

//swichボタン押した後、画像re2は表示されていないと判定させる re2IsShowing = false;

            re2.animate().alpha(0).setDuration(1000);
            re3.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Play ~", Toast.LENGTH_LONG) .show ();

        } else {

            re1IsShowing = true;
            re2IsShowing = true;


            re3.animate().alpha(0).setDuration(1000);
            re1.animate().alpha(1).setDuration(1000);

Toast.makeText (this, "Do you look good?", Toast.LENGTH_LONG) .show (); }

    }




}

}

What should I do.

https://akira-watson.com/android/toast-custom.html [Android] Customize Toast

The article seems to be helpful, but I think I should give up because it seems complicated and I can not understand it.