實現方法是兩個TextView疊加,只有描邊的TextView爲底,實體TextView疊加在上面
public class MyTextView2 extends TextView {
private TextView borderText = null;///用於描邊的TextView
public MyTextView2(Context context) {
super(context);
borderText = new TextView(context);
init();
}
public MyTextView2(Context context, AttributeSet attrs) {
super(context, attrs);
borderText = new TextView(context, attrs);
init();
}
public MyTextView2(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
borderText = new TextView(context, attrs, defStyleAttr);
init();
}
public void init() {
TextPaint tp1 = borderText.getPaint();
tp1.setStrokeWidth(1); //設置描邊寬度
tp1.setStyle(Paint.Style.STROKE); //對文字只描邊
borderText.setTextColor(Color.GREEN); //設置描邊顏色
borderText.setGravity(getGravity());
}
@Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
super.setLayoutParams(params);
borderText.setLayoutParams(params);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
CharSequence tt = borderText.getText();
//兩個TextView上的文字必須一致
if (tt == null || !tt.equals(this.getText())) {
borderText.setText(getText());
this.postInvalidate();
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
borderText.measure(widthMeasureSpec, heightMeasureSpec);
}
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
borderText.layout(left, top, right, bottom);
}
@Override
protected void onDraw(Canvas canvas) {
borderText.draw(canvas);
super.onDraw(canvas);
}
}
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