Zi 字媒體

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; ArrayAdapteraa; 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 學習總集