ToolBar左上角返回按钮的监听

1.设置ToolBar可显示

toolbar.setTitle("");

setSupportActionBar(toolbar);//显示ToolBar

//返回按钮的监听

getSupportActionBar().setDisplayHomeAsUpEnabled(true);

getSupportActionBar().setHomeButtonEnabled(true);

2.重写onOptionsItemSelected方法

@Override

public boolean onOptionsItemSelected(MenuItem item) {

if(item.getItemId()==android.R.id.home){

finish();

}

return super.onOptionsItemSelected(item);

}