TextView+ToggleButton

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout  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"
    android:orientation="vertical"
    tools:context="com.example.wlf.sevencontrols.MainActivity">


    <TextView
        android:id="@+id/textView"
        android:layout_width="200dp"
        android:layout_height="50dp"
        android:text="@string/hello"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.056"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.017" />


    <ToggleButton
        android:id="@+id/toggleButton2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="ToggleButton"
        android:textOff="未完成"
        android:textOn="完成"/>


    <Button
        android:id="@+id/button2"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:text="next" />
</LinearLayout >

public class MainActivityextends AppCompatActivity {

    @Override
    protected voidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //开关按钮ToggleButton的使用
        finalToggleButton toggleButton;
        toggleButton = (ToggleButton) findViewById(R.id.toggleButton2);
        toggleButton.setOnClickListener(newView.OnClickListener() {
            public void onClick(View v) {
                // 当按钮第一次被点击时候响应的事件
                if(toggleButton.isChecked()) {
                    Toast.makeText(MainActivity.this,"作业未完成", Toast.LENGTH_SHORT).show();
                }
                // 当按钮再次被点击时候响应的事件
                else{
                    Toast.makeText(MainActivity.this,"作业已完成", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}