[英]Android: Code to catch every possible type of “Enter” key (hard and soft)?
[英]Android handle soft enter key
我在android上構建了一個非常簡單的列表應用程序,其中有用於輸入的edittext,用於存儲保存的輸入的listview和用於將文本從edittext推送到listview的按鈕。 現在,我正在嘗試處理錯誤鍵,因此它不僅不會在印刷時創建新行,而且還可以在單擊Enter鍵時將其發送到列表視圖。
我將edittext設置為singleline以防止出現新行,並且在我的edittext中添加了onEditorActionListener來處理按鍵事件。 這是我的代碼。
activity_main.xml
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/myEditText"
android:imeOptions="actionSearch|actionGo"
android:hint="Enter a new item"
android:singleLine="true"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_toLeftOf="@+id/myImageButton"
android:layout_toStartOf="@+id/myImageButton"/>
MainActivity.java
public class MainActivity extends AppCompatActivity {
// Declare our View variables
private ListView mListView;
private EditText mEditText;
private Button mDoneButton;
private ImageButton mImageButton;
private static final String TAG = MainActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Assign the view from the layout file to the corresponding variables
mListView = (ListView) findViewById(R.id.myListView);
mEditText = (EditText) findViewById(R.id.myEditText);
mDoneButton = (Button) findViewById(R.id.myDoneButton);
mImageButton = (ImageButton) findViewById(R.id.myImageButton);
// Listview items adapter
items = new ArrayList<>();
readItems();
itemsAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, items);
mListView.setAdapter(itemsAdapter);
//setup enter listener
mEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
boolean handled = false;
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
//handle search key click
onAddItem(v);
Log.d(TAG, "Handled!");
return true;
}
if (actionId == EditorInfo.IME_ACTION_GO) {
//Handle go key click
onAddItem(v);
return true;
}
return handled;
}
});
}
//Add item to list from either the button or enter
public void onAddItem(View v) {
String itemText = mEditText.getText().toString();
itemsAdapter.add(itemText);
mEditText.setText("");
writeItems();
}
代碼給我帶來麻煩。 我什至沒有從該log.d中得到任何東西,但是除了偵聽器之外,代碼中的所有其他東西都按預期工作。
//setup enter listener
mEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
boolean handled = false;
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
//handle search key click
onAddItem(v);
Log.d(TAG, "Handled!");
return true;
}
if (actionId == EditorInfo.IME_ACTION_GO) {
//Handle go key click
onAddItem(v);
return true;
}
return handled;
}
});
為了使用IME_ACTION_SEARCH
和其他,您還需要在xml-layout中指定以下操作:
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/myEditText"
android:imeOptions="actionSearch|others"
...
/>
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