查看自定义ViewGroup 和 View 流程

虽然android提供了很多组件，但有时还是不能满足开发中的古怪需求，

所以自定义就不可避免，而每次自定义组件时都很混乱。

所以备份自定义组件的相关log，以便于查看

1.自定义ViewGroup

package com.weidingqiang.testviewb;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by weidingqiang on 15/11/20.
 */
public class BaseViewGroup extends ViewGroup {

    private static final String TAG = BaseViewGroup.class.getSimpleName();

    public BaseViewGroup(Context context) {
        super(context);
        Log.d(TAG,">>>>>>BaseViewGroup>>>>>>");
    }

    public BaseViewGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.d(TAG, ">>>>>>BaseViewGroup>>>>>>    AttributeSet  ");
    }

    public BaseViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        Log.d(TAG, ">>>>>>BaseViewGroup>>>>>>    defStyleAttr");
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        measureChildren(widthMeasureSpec,heightMeasureSpec);

        Log.d(TAG,">>>>>>onMeasure>>>>>>");

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        Log.d(TAG,">>>>>>onSizeChanged>>>>>>");

        super.onSizeChanged(w, h, oldw, oldh);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {

        View view = getChildAt(0);
        view.layout(l,t,r,b);
        Log.d(TAG,">>>>>>onLayout>>>>>>");
    }

    @Override
    protected void onFinishInflate() {
        Log.d(TAG,">>>>>>onFinishInflate>>>>>>");
        super.onFinishInflate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        Log.d(TAG, ">>>>>>onDraw>>>>>>");

    }
}

2 自定义 View

package com.weidingqiang.testviewb;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * Created by weidingqiang on 15/11/20.
 */
public class BaseView extends View {

    private static final String TAG = BaseView.class.getSimpleName();

    private Paint paint;

    public BaseView(Context context) {
        super(context);
        Log.d(TAG, ">>>>>>BaseView>>>>>>");
    }

    public BaseView(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.d(TAG, ">>>>>>BaseView>>>>>>  AttributeSet");

        paint = new Paint();
        paint.setTextSize(40);
        // mPaint.setColor(mTitleTextColor);

    }

    public BaseView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        Log.d(TAG, ">>>>>>BaseView>>>>>>   defStyleAttr");
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        Log.d(TAG, ">>>>>>onMeasure>>>>>>");

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        Log.d(TAG,">>>>>>onSizeChanged>>>>>>");

        super.onSizeChanged(w, h, oldw, oldh);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        Log.d(TAG, ">>>>>>onLayout>>>>>>");
    }

    @Override
    protected void onFinishInflate() {
        Log.d(TAG,">>>>>>onFinishInflate>>>>>>");
        super.onFinishInflate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        Log.d(TAG, ">>>>>>onDraw>>>>>>");

        paint.setColor(Color.YELLOW);
        canvas.drawRect(0, 0, getMeasuredWidth(), getMeasuredHeight(), paint);

        paint.setColor(Color.BLACK);
        canvas.drawText("beidanga", 100 , 100, paint);


    }
}

3.布局文件

 <com.weidingqiang.testviewb.BaseViewGroup
        android:id="@+id/baseviewgroup"
        android:layout_width="300dp"
        android:layout_height="300dp"
        >

        <com.weidingqiang.testviewb.BaseView
            android:layout_width="100dp"
            android:layout_height="100dp"
            />
    </com.weidingqiang.testviewb.BaseViewGroup>

最终要的莫过于log信息了

打印如下：

11-19 06:35:22.248 D/BaseViewGroup: >>>>>>BaseViewGroup>>>>>> AttributeSet
11-19 06:35:22.249 D/BaseView: >>>>>>BaseView>>>>>> AttributeSet
11-19 06:35:22.249 D/BaseView: >>>>>>onFinishInflate>>>>>>
11-19 06:35:22.249 D/BaseViewGroup: >>>>>>onFinishInflate>>>>>>
11-19 06:35:22.286 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.286 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.286 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.286 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.414 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.414 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.414 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.414 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.414 D/BaseViewGroup: >>>>>>onSizeChanged>>>>>>
11-19 06:35:22.414 D/BaseView: >>>>>>onSizeChanged>>>>>>
11-19 06:35:22.414 D/BaseView: >>>>>>onLayout>>>>>>
11-19 06:35:22.414 D/BaseViewGroup: >>>>>>onLayout>>>>>>
11-19 06:35:22.436 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.436 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.436 D/BaseView: >>>>>>onMeasure>>>>>>
11-19 06:35:22.436 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:35:22.436 D/BaseView: >>>>>>onLayout>>>>>>
11-19 06:35:22.436 D/BaseViewGroup: >>>>>>onLayout>>>>>>
11-19 06:35:22.438 D/BaseView: >>>>>>onDraw>>>>>>

而修改ViewGroup布局时

 ViewGroup.LayoutParams layoutParams = baseViewGroup.getLayoutParams();
layoutParams.height+=30;
baseViewGroup.setLayoutParams(layoutParams);

//baseViewGroup.onSizeChanged(0,0,0,0);

打印log为：

11-19 06:37:52.449 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:37:52.449 D/BaseViewGroup: >>>>>>onMeasure>>>>>>
11-19 06:37:52.449 D/BaseViewGroup: >>>>>>onSizeChanged>>>>>>
11-19 06:37:52.449 D/BaseView: >>>>>>onSizeChanged>>>>>>
11-19 06:37:52.449 D/BaseView: >>>>>>onLayout>>>>>>
11-19 06:37:52.449 D/BaseViewGroup: >>>>>>onLayout>>>>>>
11-19 06:37:52.449 D/BaseView: >>>>>>onDraw>>>>>>

 

如果想刷新 draw 方法，则直接调用invalidate （UI线程中） 或者 postInvalidate