17_读取字体资源在canvas中绘文本

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {
  

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(new RenderView(this));
    }
}

class RenderView extends View {
    Paint paint;
    Typeface font;
    Rect bounds = new Rect();

    public RenderView(Context context) {
        super(context);
        paint = new Paint();
        font = Typeface.createFromAsset(context.getAssets(), "font.ttf");
    }

    protected void onDraw(Canvas canvas) {
        paint.setColor(Color.YELLOW);
        paint.setTypeface(font);
        paint.setTextSize(28);
        paint.setTextAlign(Paint.Align.CENTER);
        canvas.drawText("This is a test!", canvas.getWidth() / 2, 100,
                paint);

        String text = "This is another test o_O";
        paint.setColor(Color.WHITE);
        paint.setTextSize(18);
        paint.setTextAlign(Paint.Align.LEFT);
        paint.getTextBounds(text, 0, text.length(), bounds);
        canvas.drawText(text, canvas.getWidth() - bounds.width(), 140,
                paint);
        invalidate();
    }
}