CompatToolbar.java

package com.llf.basemodel.commonwidget;

import android.content.Context;
import android.os.Build;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;

/**
 * Created by llf on 2017/3/8.
 * 沉浸式、版本兼容的Toolbar，状态栏透明
 */

public class CompatToolbar extends Toolbar {

    public CompatToolbar(Context context) {
        this(context, null);
    }

    public CompatToolbar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CompatToolbar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        setup();
    }

    public void setup() {
        int compatPadingTop = 0;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            compatPadingTop = getStatusBarHeight();
        }
        this.setPadding(getPaddingLeft(), getPaddingTop() + compatPadingTop, getPaddingRight(), getPaddingBottom());
    }

    public int getStatusBarHeight() {
        int statusBarHeight = 0;
        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            statusBarHeight = getResources().getDimensionPixelSize(resourceId);
        }
        return statusBarHeight;
    }

    public float px2dp(float pxVal) {
        final float scale = getContext().getResources().getDisplayMetrics().density;
        return (pxVal / scale);
    }
}