[英]How to add text to a drawable
I want to edit an image by adding text on top of an existing image.我想通过在现有图像上添加文本来编辑图像。 I tried this, but the drawable in the ImageView disappears:
我试过这个,但 ImageView 中的可绘制对象消失了:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnAdd=(Button) findViewById(R.id.btnAdd);
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
EditText firstNum=(EditText)findViewById(R.id.fisrtNum);
EditText secondNum=(EditText)findViewById(R.id.secondNum);
TextView sumTV=(TextView)findViewById(R.id.sumTV);
ImageView picIV=(ImageView) findViewById(R.id.picIV);
Bitmap bitmap = Bitmap.createBitmap(300, 200, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setTextSize(42);
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText("hello world",150,30,paint);
paint.setColor(Color.BLUE);
canvas.drawCircle(50, 50, 10, paint);
picIV.setImageBitmap(bitmap);
picIV.setImageDrawable(new BitmapDrawable(getResources(), bitmap));
sumTV.setText(result+"");
}
}
}
Thank you in advance for helping find a solution.提前感谢您帮助找到解决方案。 My goal is to be able to edit an image and to send it to other apps.
我的目标是能够编辑图像并将其发送到其他应用程序。
Thanks for the link.感谢您的链接。 Very helpful.
非常有帮助。 Turns out i was not declaring my Bitmap correctly.
原来我没有正确声明我的 Bitmap。
This solved the problem这解决了问题
picIV.buildDrawingCache();
Bitmap bitmap= picIV.getDrawingCache();
Its a deprecated method, but it works.它是一种已弃用的方法,但它有效。
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