[英]Clear the contents of an EditText Field once button is pressed
I am creating a simple app which automatically triggers a button b
once the contents of an EditText
field called a
contains a key phrase.我正在创建一个简单的应用程序,一旦名为a
的EditText
字段的内容包含一个关键短语,它就会自动触发按钮b
。 I am wanting to clear the contents of the edit text field automatically say after 2 seconds.我想在 2 秒后自动清除编辑文本字段的内容。 Is there a easy way to implement this into my code below?有没有一种简单的方法可以将其实现到我下面的代码中?
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("");
}
}
Additionally, due to using a boolean method, if I go back to this activity using the back button etc in my app, it does not seem to trigger the option again.此外,由于使用了布尔方法,如果我使用应用程序中的后退按钮等返回此活动,它似乎不会再次触发该选项。 Is there a way to cause it to trigger b
again if I return back to the same window/activity?如果我返回到同一个窗口/活动,有没有办法让它再次触发b
?
I'll really appreciate some useful help in modifying part of my code shown above.在修改上面显示的部分代码时,我将非常感谢一些有用的帮助。
For the first part, you're actually doing it already on your code.对于第一部分,您实际上已经在您的代码上这样做了。 The only thing that I don't understand is as to why do you have the boolean isDone
?我唯一不明白的是为什么你有boolean isDone
? Have you tried removing it?你试过删除它吗? Since if you already cleared the EditText
, even if it does go through onTextChanged
again, it wont pass the first condition again (Here I'm presuming that b
s action is to clear the text of a
).因为如果你已经清除了EditText
,即使它经过onTextChanged
再次,它不会再次通过第一个条件(在这里我假定b
的行动是明确的文字a
)。
For the text checking, I think you can use androids TextUtils.equals() :对于文本检查,我认为您可以使用 androids TextUtils.equals() :
TextUtils.equals(s, "open voice command");
EDIT编辑
Okay.好的。 So I re-analyzed your post and your comments and ended up with this flow of behavior.所以我重新分析了你的帖子和你的评论,最终得出了这种行为流。
The First time the activity runs, when you type in "open voice command" in EditText a
, Button b
will be automatically clicked and will proceed to starting an activity and MUST clear EditText a
.活动第一次运行时,当您在EditText a
输入“打开语音命令”时, Button b
将被自动单击并继续启动活动,并且必须清除EditText a
。 Pressing back to the activity that contains both EditText a
and Button b
, you want the EditText a
onTextChangeListener
to still function.回到同时包含EditText a
和Button b
,您希望EditText a
onTextChangeListener
仍然起作用。
With those in mind, I ended up modifying your code as below:考虑到这些,我最终修改了您的代码,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);
}
});
}
}
When I type in "open voice command" in EditText a
, is automatically gets cleared and calls the performClick()
for Button b
.当我在EditText a
输入“打开语音命令”时,它会自动被清除并为Button b
调用performClick()
。 After I get back to the activity.在我回到活动之后。 Nothing happens, the handler doesn't run since the text value of EditText a
is empty.没有任何反应,处理程序不会运行,因为EditText a
的文本值为空。 The handler will only trigger again if you type in "open voice command".如果您输入“打开语音命令”,处理程序只会再次触发。
EDIT 2编辑 2
Here is the code I am running.这是我正在运行的代码。 I just commented out most of the codes that are not related to the concern on your post.我只是注释掉了大部分与您帖子中关注的问题无关的代码。 I'm getting the correct behavior you are aiming for.我得到了你想要的正确行为。
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("");
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.