Android:如何将文本写入图像中的特定区域

干得好:

<FrameLayout 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/pencil">

        <TextView
            android:id="@+id/circle"
            android:layout_width="22dp"
            android:layout_height="22dp"
            android:background="@drawable/circle"
            android:gravity="center"
            android:text="2"
            android:layout_gravity="bottom|right"
            android:layout_marginRight="8dp"
            android:layout_marginBottom="8dp"
            android:textColor="#FFFFFF"
            android:textSize="12sp" />

    </FrameLayout>

图像:

输出:

您可以创建从ImageView扩展的自定义View类。您必须重写onDraw方法并执行以下操作:

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    // Calculate x and y positions and set up a Paint instance with correct color/size
    canvas.drawText(String.valueOf(myNumber), x, y, myPaint);
}

尝试将背景设置为图像的Textview

<TextView android:id="@+id/img" android:layout_width="45sp" android:layout_height="45sp" android:background="@drawable/circle" android:gravity="center" android:text="r" /> 使用重力在图像内对齐文本。

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="bottom|right"
    android:paddingRight="20dp"
    android:paddingBottom="15dp"
    android:textColor="@android:color/white"
    android:background="@drawable/text"
    android:text="1" />

try this code    
Bitmap bitmap = ... // Load your bitmap here
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint(); 
paint.setColor(Color.BLACK); 
paint.setTextSize(10); 
canvas.drawText("Some Text here", x, y, paint);