试图创建笔记应用程序。我想在按钮点击后添加动态文本视图,它应该一个接一个地添加到布局中。在我的代码中,只有一个文本视图成功添加,但从第二次,应用程序崩溃。请帮忙
XML code:
<EditText
android:id="@+id/text_thingsToDo"
android:layout_width="@dimen/ThingsToDo_EditText_Width"
android:layout_height="@dimen/ThingsToDo_EditText_Height"
android:layout_margin="@dimen/Standardize_Margin"
android:background="@color/ThingsToDo_EditText_Color"/>
<Button
android:id="@+id/save_thingsToDo"
android:layout_toRightOf="@+id/text_thingsToDo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ThingsToDo_Save_Button_Text"
android:layout_marginRight="@dimen/Standardize_Margin"
android:layout_marginTop="@dimen/Standardize_Margin"
android:layout_marginBottom="@dimen/Standardize_Margin"
android:background="@color/ThingsToDo_Save_Button"
android:textColor="@color/White"
android:layout_centerVertical="true"/>
Java代码:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_things_to_do);
final EditText editText = (EditText) findViewById(R.id.text_thingsToDo);
Button button = (Button) findViewById(R.id.save_thingsToDo);
final TextView notesView = new TextView(this);
final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.rootView_ThingsToDo);
final ArrayList<String> arrayList = new ArrayList<String>();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
notesView.setText(editText.getText().toString());
linearLayout.addView(notesView);
}
});
}
也许每次按下按钮都会创建一个新的TextView?尝试将TextView声明为类成员,然后在OnClickListener
中执行此操作:
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
notesView = new TextView(this);
notesView.setText(editText.getText().toString());
linearLayout.addView(notesView);
}
});
希望这将解决您的问题!