[英]Clear the contents of an EditText Field once button is pressed
我正在創建一個簡單的應用程序,一旦名為a
的EditText
字段的內容包含一個關鍵短語,它就會自動觸發按鈕b
。 我想在 2 秒后自動清除編輯文本字段的內容。 有沒有一種簡單的方法可以將其實現到我下面的代碼中?
public class PocketSphinxActivity extends Activity implements RecognitionListener
{
private static final String KWS_SEARCH = "wakeup";
/* Keyword we are looking for to activate menu */
private static final String KEYPHRASE = "open voice command"; //adjust this keyphrase!
private SpeechRecognizer recognizer;
private HashMap<String, Integer> captions;
ListView lv;
TextView tv;
EditText a;
Button b;
Button c;
Boolean isDone = false;
@Override
public void onCreate(Bundle state) {
super.onCreate(state);
// Prepare the data for UI
captions = new HashMap<String, Integer>();
captions.put(KWS_SEARCH, R.string.kws_caption);
setContentView(R.layout.main);
((TextView) findViewById(R.id.caption_text))
.setText("Preparing the recognizer");
lv = (ListView) findViewById(R.id.lvVoiceReturn);
tv = (TextView) findViewById(R.id.result_text);
a = (EditText) findViewById(R.id.TFusername);
b = (Button) findViewById(R.id.bVoice);
c = (Button)findViewById(R.id.Blogin);
// Recognizer initialization is a time-consuming and it involves IO,
// so we execute it in async task
new AsyncTask<Void, Void, Exception>() {
@Override
protected Exception doInBackground(Void... params) {
try {
Assets assets = new Assets(PocketSphinxActivity.this);
File assetDir = assets.syncAssets();
setupRecognizer(assetDir);
} catch (IOException e) {
return e;
}
return null;
}
@Override
protected void onPostExecute(Exception result) {
if (result != null) {
((TextView) findViewById(R.id.caption_text))
.setText("Failed to init recognizer " + result);
} else {
switchSearch(KWS_SEARCH);
}
}
}.execute();
//line added.../////////////////////////
a.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.toString().trim().equalsIgnoreCase("open voice command")) {
//
//Do your stuff here OR button.performClick()
//
//DELAY
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (!isDone) {
b.performClick();
isDone = true;
}
}
}, 500);
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
////////////////////////////////////////
}
@Override
public void onDestroy() {
super.onDestroy();
recognizer.cancel();
recognizer.shutdown();
}
/**
* In partial result we get quick updates about current hypothesis. In
* keyword spotting mode we can react here, in other modes we need to wait
* for final result in onResult.
*/
@Override
public void onPartialResult(Hypothesis hypothesis) {
if (hypothesis == null)
return;
String text = hypothesis.getHypstr();
//((TextView) findViewById(R.id.result_text)).setText(text);
((EditText) findViewById(R.id.TFusername)).setText(text);
}
/**
* This callback is called when we stop the recognizer.
*/
@Override
public void onResult(Hypothesis hypothesis) {
//((TextView) findViewById(R.id.result_text)).setText("");
((EditText) findViewById(R.id.TFusername)).setText("");
if (hypothesis != null) {
String text = hypothesis.getHypstr();
makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
//a.setText((String) tv.getText());
//tv = TextView.getText().toString();
}
}
@Override
public void onBeginningOfSpeech() {
}
/**
* We stop recognizer here to get a final result
*/
@Override
public void onEndOfSpeech() {
if (!recognizer.getSearchName().equals(KWS_SEARCH))
switchSearch(KWS_SEARCH);
}
private void switchSearch(String searchName) {
recognizer.stop();
// If we are not spotting, start listening with timeout (10000 ms or 10 seconds).
if (searchName.equals(KWS_SEARCH))
recognizer.startListening(searchName);
else
recognizer.startListening(searchName, 10000);
String caption = getResources().getString(captions.get(searchName));
((TextView) findViewById(R.id.caption_text)).setText(caption);
}
private void setupRecognizer(File assetsDir) throws IOException {
// The recognizer can be configured to perform multiple searches
// of different kind and switch between them
recognizer = defaultSetup()
.setAcousticModel(new File(assetsDir, "en-us-ptm"))
.setDictionary(new File(assetsDir, "cmudict-en-us.dict"))
// To disable logging of raw audio comment out this call (takes a lot of space on the device)
.setRawLogDir(assetsDir)
// Threshold to tune for keyphrase to balance between false alarms and misses
.setKeywordThreshold(1e-45f)
// Use context-independent phonetic search, context-dependent is too slow for mobile
.setBoolean("-allphone_ci", true)
.getRecognizer();
recognizer.addListener(this);
/** In your application you might not need to add all those searches.
* They are added here for demonstration. You can leave just one.
*/
// Create keyword-activation search.
recognizer.addKeyphraseSearch(KWS_SEARCH, KEYPHRASE);
}
@Override
public void onError(Exception error) {
((TextView) findViewById(R.id.caption_text)).setText(error.getMessage());
}
@Override
public void onTimeout() {
switchSearch(KWS_SEARCH);
}
//Assign button clicks to go to a new activity:
public void onButtonClick_1(View v){
if (v.getId() == R.id.bVoice){
String str_1 = a.getText().toString();
//Go to the relevant page if any part of the phrase or word entered in the 'EditText' field contains 'command' which is not case sensitive
if (str_1.toLowerCase().contains("command")) {
Intent userintent = new Intent(PocketSphinxActivity.this, Gvoice.class);
startActivity(userintent);
} else {
Toast.makeText(getApplicationContext(), "Incorrect Information", Toast.LENGTH_SHORT).show();
}
}
}
//Added this to clear the 'open voice command' text when pressing back from a activity window
//This at the moment seems to only work when typing the command, If I use speech to text to say'open voice command
@Override
public void onResume(){
super.onResume();
isDone = false;
a.setText("");
}
}
此外,由於使用了布爾方法,如果我使用應用程序中的后退按鈕等返回此活動,它似乎不會再次觸發該選項。 如果我返回到同一個窗口/活動,有沒有辦法讓它再次觸發b
?
在修改上面顯示的部分代碼時,我將非常感謝一些有用的幫助。
對於第一部分,您實際上已經在您的代碼上這樣做了。 我唯一不明白的是為什么你有boolean isDone
? 你試過刪除它嗎? 因為如果你已經清除了EditText
,即使它經過onTextChanged
再次,它不會再次通過第一個條件(在這里我假定b
的行動是明確的文字a
)。
對於文本檢查,我認為您可以使用 androids TextUtils.equals() :
TextUtils.equals(s, "open voice command");
編輯
好的。 所以我重新分析了你的帖子和你的評論,最終得出了這種行為流。
活動第一次運行時,當您在EditText a
輸入“打開語音命令”時, Button b
將被自動單擊並繼續啟動活動,並且必須清除EditText a
。 回到同時包含EditText a
和Button b
,您希望EditText a
onTextChangeListener
仍然起作用。
考慮到這些,我最終修改了您的代碼,如下所示:
public class MainActivity extends AppCompatActivity {
EditText a;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initialize Views
a = (EditText) findViewById(R.id.a);
b = (Button) findViewById(R.id.b);
// Initialize listeners
a.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (TextUtils.equals(s, "open voice command")) {
Log.d("SAMPLE", ">>>>>>> Running handler!....");
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
a.setText(null);
b.performClick();
}
}, 500);
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, SampleActivity.class);
startActivity(intent);
}
});
}
}
當我在EditText a
輸入“打開語音命令”時,它會自動被清除並為Button b
調用performClick()
。 在我回到活動之后。 沒有任何反應,處理程序不會運行,因為EditText a
的文本值為空。 如果您輸入“打開語音命令”,處理程序只會再次觸發。
編輯 2
這是我正在運行的代碼。 我只是注釋掉了大部分與您帖子中關注的問題無關的代碼。 我得到了你想要的正確行為。
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.speech.RecognitionListener;
import android.speech.SpeechRecognizer;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
public class PocketSphinxActivity extends Activity implements RecognitionListener {
private static final String KWS_SEARCH = "wakeup";
/* Keyword we are looking for to activate menu */
private static final String KEYPHRASE = "open voice command"; //adjust this keyphrase!
private SpeechRecognizer recognizer;
private HashMap<String, Integer> captions;
ListView lv;
TextView tv;
EditText a;
Button b;
Button c;
Boolean isDone = false;
@Override
public void onCreate(Bundle state) {
super.onCreate(state);
setContentView(R.layout.activity_main);
// Prepare the data for UI
// captions = new HashMap<String, Integer>();
// captions.put(KWS_SEARCH, R.string.kws_caption);
// ((TextView) findViewById(R.id.caption_text))
// .setText("Preparing the recognizer");
// lv = (ListView) findViewById(R.id.lvVoiceReturn);
// tv = (TextView) findViewById(R.id.result_text);
a = (EditText) findViewById(R.id.a);
b = (Button) findViewById(R.id.b);
// c = (Button) findViewById(R.id.Blogin);
// Recognizer initialization is a time-consuming and it involves IO,
// so we execute it in async task
// new AsyncTask<Void, Void, Exception>() {
// @Override
// protected Exception doInBackground(Void... params) {
// try {
// Assets assets = new Assets(PocketSphinxActivity.this);
// File assetDir = assets.syncAssets();
// setupRecognizer(assetDir);
// } catch (IOException e) {
// return e;
// }
// return null;
// }
//
// @Override
// protected void onPostExecute(Exception result) {
// if (result != null) {
// ((TextView) findViewById(R.id.caption_text))
// .setText("Failed to init recognizer " + result);
// } else {
// switchSearch(KWS_SEARCH);
// }
// }
// }.execute();
//line added.../////////////////////////
a.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.toString().trim().equalsIgnoreCase("open voice command")) {
//
//Do your stuff here OR button.performClick()
//
//DELAY
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (!isDone) {
b.performClick();
isDone = true;
}
}
}, 500);
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
////////////////////////////////////////
}
@Override
public void onDestroy() {
super.onDestroy();
// recognizer.cancel();
// recognizer.shutdown();
}
/**
* In partial result we get quick updates about current hypothesis. In
* keyword spotting mode we can react here, in other modes we need to wait
* for final result in onResult.
*/
// @Override
// public void onPartialResult(Hypothesis hypothesis) {
// if (hypothesis == null)
// return;
//
// String text = hypothesis.getHypstr();
// //((TextView) findViewById(R.id.result_text)).setText(text);
// ((EditText) findViewById(R.id.TFusername)).setText(text);
// }
/**
* This callback is called when we stop the recognizer.
*/
// @Override
// public void onResult(Hypothesis hypothesis) {
// //((TextView) findViewById(R.id.result_text)).setText("");
// ((EditText) findViewById(R.id.TFusername)).setText("");
// if (hypothesis != null) {
// String text = hypothesis.getHypstr();
// makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
//
//
// //a.setText((String) tv.getText());
// //tv = TextView.getText().toString();
// }
// }
/**
* We stop recognizer here to get a final result
*/
@Override
public void onEndOfSpeech() {
// if (!recognizer.getSearchName().equals(KWS_SEARCH))
// switchSearch(KWS_SEARCH);
}
private void switchSearch(String searchName) {
// recognizer.stop();
//
// // If we are not spotting, start listening with timeout (10000 ms or 10 seconds).
// if (searchName.equals(KWS_SEARCH))
// recognizer.startListening(searchName);
// else
// recognizer.startListening(searchName, 10000);
//
// String caption = getResources().getString(captions.get(searchName));
// ((TextView) findViewById(R.id.caption_text)).setText(caption);
}
private void setupRecognizer(File assetsDir) throws IOException {
// The recognizer can be configured to perform multiple searches
// of different kind and switch between them
// recognizer = defaultSetup()
// .setAcousticModel(new File(assetsDir, "en-us-ptm"))
// .setDictionary(new File(assetsDir, "cmudict-en-us.dict"))
//
// // To disable logging of raw audio comment out this call (takes a lot of space on the device)
// .setRawLogDir(assetsDir)
//
// // Threshold to tune for keyphrase to balance between false alarms and misses
// .setKeywordThreshold(1e-45f)
//
// // Use context-independent phonetic search, context-dependent is too slow for mobile
// .setBoolean("-allphone_ci", true)
//
// .getRecognizer();
// recognizer.addListener(this);
/** In your application you might not need to add all those searches.
* They are added here for demonstration. You can leave just one.
*/
// Create keyword-activation search.
// recognizer.addKeyphraseSearch(KWS_SEARCH, KEYPHRASE);
}
// @Override
// public void onError(Exception error) {
// ((TextView) findViewById(R.id.caption_text)).setText(error.getMessage());
// }
// @Override
// public void onTimeout() {
// switchSearch(KWS_SEARCH);
// }
//Assign button clicks to go to a new activity:
public void onButtonClick_1(View v) {
if (v.getId() == R.id.b) {
String str_1 = a.getText().toString();
//Go to the relevant page if any part of the phrase or word entered in the 'EditText' field contains 'command' which is not case sensitive
if (str_1.toLowerCase().contains("command")) {
Intent userintent = new Intent(PocketSphinxActivity.this, Gvoice.class);
startActivity(userintent);
} else {
Toast.makeText(getApplicationContext(), "Incorrect Information", Toast.LENGTH_SHORT).show();
}
}
}
//Added this to clear the 'open voice command' text when pressing back from a activity window
//This at the moment seems to only work when typing the command, If I use speech to text to say'open voice command
@Override
public void onResume() {
super.onResume();
isDone = false;
a.setText("");
}
}
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