public View inflate(int resource, ViewGroup root, boolean attachToRoot)
参数解释:
1.resource --> xml 资源的ID,例如R.layout.activity_main;
2.root --> 该参数可选,如果attachToRoot为true的情况下,root会作为resource的的父视图.
3.attachToRoot resource资源是否需要装载到root中.
package com.test.app;
/**
* 测试
* Created by fengwenhua on 2017/5/23.
*/
public class TestActivity extends AppCompatActivity {
@BindView(R.id.splash_rl_content)
public LinearLayout splash_rl_content;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
ButterKnife.bind(this);
// testLayoutInflater();
testChildViewHeight();
testChildViewHeightNormal();
}
/**
* 以下代码将导致系统崩溃
* inflate(R.layout.activity_splash,splash_rl_content,true)
* 究其原因,在attachToRoot为true且root不为空的情况下,view 已经被添加到root中,已经存在父视图
*/
public void testLayoutInflater(){
View view = getLayoutInflater().inflate(R.layout.item_test,splash_rl_content,true);
// 以下代码将导致如下异常,并导致系统崩溃
// java.lang.IllegalStateException: The specified child already has a parent.
// You must call removeView() on the child's parent first.
splash_rl_content.addView(view);//问题点
}
/**
* 以下代码会导致item_test的宽高不起作用
*/
public void testChildViewHeight(){
View view = getLayoutInflater().inflate(R.layout.item_test,null);
splash_rl_content.addView(view);
}
/**
* 以下代码会导致item_test的宽高不起作用
*/
public void testChildViewHeightNormal(){
View view = getLayoutInflater().inflate(R.layout.item_test,splash_rl_content,true);
// splash_rl_content.addView(view);
}
}
