动态添加布局、动态添加View、LinearLayout动态添加View；

LinearLayout提供了几个方法，用作动态添加View特别好用；

可以添加View、删除View、删除指定位置View、删除全部View；

看代码：

public class MainActivity extends AppCompatActivity {

    private final String TAG = MainActivity.class.getSimpleName();

    LinearLayout ll;
    private LayoutInflater mInflater;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        mInflater = LayoutInflater.from(this);
        ll = findViewById(R.id.ll);
        findViewById(R.id.btn1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "add", Toast.LENGTH_SHORT).show();
                ll.addView(View.inflate(MainActivity.this, R.layout.item, null)); //添加一个View
            }
        });
        findViewById(R.id.btn2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "delect", Toast.LENGTH_SHORT).show();
                ll.removeViewAt(1); //删除指定位置的View
//                ll.removeView(view); //删除指定View
            }
        });
        findViewById(R.id.btn3).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "delectAll", Toast.LENGTH_SHORT).show();
                ll.removeAllViews();  //删除全部View
            }
        });
    }
}

Xml布局文件：

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    tools:context=".MainActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:id="@+id/ll"
        >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <Button
            android:id="@+id/btn1"
            android:text="添加"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button
            android:id="@+id/btn2"
            android:text="删除"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button
            android:id="@+id/btn3"
            android:text="清空"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
    </LinearLayout>
</ScrollView>

添加的View：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/tv"
        android:background="@color/colorAccent"
        android:layout_width="match_parent"
        android:layout_height="200dp" />

</LinearLayout>