CalendarActivity.java 文件源码

private void initializeToolbar() {

        Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(mToolbar);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setTitle("");
        final Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_black_24dp);
        upArrow.setColorFilter(getResources().getColor(R.color.white), PorterDuff.Mode.SRC_ATOP);
        getSupportActionBar().setHomeAsUpIndicator(upArrow);
//        mToolbar.setNavigationIcon(R.drawable.ic_arrow_back_black_24dp);
        mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onBackPressed();
            }
        });
    }