How to add custom text over a Bitmap image from your Android App?
In this video it shows the steps to add text over an existing image by reading it in Bitmap format. It creates a Canvas using the Bitmap and then calls drawText option to edit the bitmap file.
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Complete source code and other details/ steps of this video are posted in the below link:
https://programmerworld.co/android/ho...
However, the main Java code is copied below also for reference:
package com.programmerworld.textonbitmapimage;
import static android.Manifest.permission.READ_MEDIA_IMAGES;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.storage.StorageManager;
import android.os.storage.StorageVolume;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
public class MainActivity extends AppCompatActivity {
private ImageView imageView;
private EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main);
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) - {
Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
ActivityCompat.requestPermissions(this,
new String[]{READ_MEDIA_IMAGES},
PackageManager.PERMISSION_GRANTED);
imageView = findViewById(R.id.imageView);
editText = findViewById(R.id.editTextText);
return insets;
});
}
public void buttonAddTextOverImage(View view){
try {
StorageManager storageManager = (StorageManager) getSystemService(STORAGE_SERVICE);
StorageVolume storageVolume = storageManager.getStorageVolumes().get(0); // 0 is for internal storage.
File fileInput = new File(storageVolume.getDirectory().getPath() +
"/Download/flower.jpg");
File fileOutput = new File(storageVolume.getDirectory().getPath() +
"/Download/" + System.currentTimeMillis() + ".jpg");
Bitmap bitmapInputImage = BitmapFactory.decodeFile(fileInput.getPath());
Bitmap bitmapOutputImage = bitmapInputImage.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(bitmapOutputImage);
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setTextSize(20);
canvas.drawText(editText.getText().toString(),
5, 50, paint);
imageView.setImageBitmap(bitmapOutputImage);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmapOutputImage.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
byte[] bytesArray = byteArrayOutputStream.toByteArray();
FileOutputStream fileOutputStream = new FileOutputStream(fileOutput);
fileOutputStream.write(bytesArray);
fileOutputStream.close();
} catch (Exception e) {
editText.setText(e.toString());
}
}
}
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