[Android] ListView 清單按鈕元件

前面需加入

implements AdapterView.OnClickListener, AdapterView.OnItemClickListener, AdapterView.OnItemLongClickListener

ListView lv1;

lv1=(ListView)findViewById(R.id.lv1);
aa = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,strings);
lv1.setAdapter(aa);
lv1.setOnItemClickListener(this);
lv1.setOnItemLongClickListener(this);

示範

XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

    <TextView
        android:id="@+id/t1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/lv1" />

    <ListView
        android:id="@+id/lv1"
        android:layout_width="0dp"
        android:layout_height="193dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

JAVA

public class MainActivity extends AppCompatActivity implements AdapterView.OnClickListener, AdapterView.OnItemClickListener, AdapterView.OnItemLongClickListener{
    TextView t1;
ListView lv1;
    ArrayAdapter<String>aa;
    String []strings={"1","2","3"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        t1=(TextView)findViewById(R.id.t1);
        lv1=(ListView)findViewById(R.id.lv1);
        aa = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,strings);
        lv1.setAdapter(aa);
        lv1.setOnItemClickListener(this);
        lv1.setOnItemLongClickListener(this);
    }

    @Override
    public void onClick(View v) {

    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
t1.setText("你點選了數字:"+(position+1));
    }

    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        return false;
    }
}

展示

相關文章:

[Android] Android 程式設計教學

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