Android自定义View控件实现刷新效果

三种得到LinearInflater的方法

a. LayoutInflater inflater = getLayoutInflater();

b. LayoutInflater localinflater =

(LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);

c. LayoutInflater inflater = LayoutInflater.from(context);

onDraw 方法绘图，invalidate刷新界面。

效果图:

点击一下换颜色

onDraw画完图后,给控件设置点击事件 ,将参数传到控件里,然后invalidate刷新

1.onDraw画图,并增加changeColor方法

public class CusView3 extends View {
private int color = 0;
public CusView3(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint mPaint = new Paint();
if (color > 2) {
color = 0;
}
switch (color) {
case 0:
mPaint.setColor(Color.GREEN);
break;
case 1:
mPaint.setColor(Color.RED);
break;
case 2:
mPaint.setColor(Color.BLUE);
break;
default:
break;
}
mPaint.setStyle(Style.FILL);
mPaint.setTextSize(35.0f);
canvas.drawText("点击我刷新", 10, 60, mPaint);
}
public void changeColor() { //为了让外面调用
color++;
}
}

2.布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<xue.test.CusView3
android:id="@+id/cusview3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
</xue.test.CusView3>
</LinearLayout>

3.画图后 给控件设置点击事件 ,将参数传到控件里,然后invalidate刷新

public class TestCustomViewActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
view3 = (CusView3) findViewById(R.id.cusview3);
// 点击事件
view3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Message message = new Message();
message.what = 1;
myHandler.sendMessage(message);
}
});
}
Handler myHandler = new Handler() {
// 接收到消息后处理
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
// 调用方法
view3.changeColor();
// 刷新方法
view3.invalidate();
break;
}
super.handleMessage(msg);
}
};
private CusView3 view3;
}

至于自定义控件占整屏的问题,可能需要用layoutparams

以上所述是小编给大家介绍的Android自定义View控件实现刷新效果，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！

来源：http://blog.csdn.net/wanxuedong/article/details/53373407