我想在点击一个按钮时取消countdountimer的onfinish函数我执行timer.cancel但仍然在调用完成后。
running = false;
countDownTimer.cancel();
countDownTimer = null;
finish();
startActivity(i);
这是倒计时器
private CountDownTimer createTimer() {
return new CountDownTimer(getIntent().getIntExtra("timer", 5460000),
1000) {
@SuppressLint("NewApi")
public void onTick(long millisUntilFinished) {
timer.setText("Section time: "
+ String.format(
Locale.ENGLISH,
"%d min, %d sec",
TimeUnit.MILLISECONDS
.toMinutes(millisUntilFinished),
TimeUnit.MILLISECONDS
.toSeconds(millisUntilFinished)
- TimeUnit.MINUTES
.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(millisUntilFinished))));
timer_count = (int) millisUntilFinished;
}
public void onFinish() {
if (running) {
int random;
if (getIntent().getIntExtra("t_no", 0) < 20) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.vocab.size() - 11);
i.putExtra("q_no", random);
i.putExtra("t_no", 20);
i.putExtra("answers",
getIntent().getStringExtra("answers"));
countDownTimer.cancel();
countDownTimer = null;
running = false;
finish();
startActivity(i);
} else if (getIntent().getIntExtra("t_no", 0) < 40) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.listining.size() - 4);
i.putExtra("q_no", random);
i.putExtra("t_no", 40);
i.putExtra("answers",
getIntent().getStringExtra("answers"));
countDownTimer.cancel();
countDownTimer = null;
running = false;
finish();
startActivity(i);
} else if (getIntent().getIntExtra("t_no", 0) < 50) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.reading.size() - 1);
i.putExtra("paragraph_id", random + 1);
i.putExtra("q_no", 0);
i.putExtra("t_no", 50);
i.putExtra("answers",
getIntent().getStringExtra("answers"));
countDownTimer.cancel();
countDownTimer = null;
running = false;
finish();
startActivity(i);
} else if (getIntent().getIntExtra("t_no", 0) < 60) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.vid.size() - 1);
i.putExtra("Scene_ID", random + 1);
i.putExtra("q_no", 0);
i.putExtra("t_no", 60);
i.putExtra("answers",
getIntent().getStringExtra("answers"));
countDownTimer.cancel();
countDownTimer = null;
running = false;
finish();
startActivity(i);
} else if (getIntent().getIntExtra("t_no", 0) < 100) {
i = new Intent(getApplicationContext(),
Practice_result.class);
i.putExtra("type", getIntent().getStringExtra("type"));
i.putExtra("answers",
getIntent().getStringExtra("answers"));
countDownTimer.cancel();
countDownTimer = null;
running = false;
finish();
startActivity(i);
}
}
}
}.start();
}
这是我活动的一部分，我在使用倒数计时器，我没有在任何地方使用它来这里
else if (getIntent().getStringExtra("type").equalsIgnoreCase("Test")) {
timer.setVisibility(View.VISIBLE);
back.setVisibility(View.INVISIBLE);
running = true;
countDownTimer = this.createTimer();
if (getIntent().getIntExtra("t_no", 0) < 10) {
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < 50; i++) {
if (MainActivity.structure.get(i).get("type_p_t")
.equalsIgnoreCase("t"))
questions.add(MainActivity.structure.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Structure/ Sentence Completion");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int random;
if (getIntent().getIntExtra("t_no", 0) == 9) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.structure.size() - 51);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
Random r = new Random();
random = r.nextInt(MainActivity.structure.size() - 51);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.structure
.size() - 51);
}
Helper.sec_questions.add(random);
}
i.putExtra("q_no", random);
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
Details_data.why.add(questions
.get(getIntent().getIntExtra("q_no", 0))
.get("why").replace("#", ""));
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
} else if (getIntent().getIntExtra("t_no", 0) < 20) {
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
for (int i = 50; i < MainActivity.structure.size(); i++) {
if (MainActivity.structure.get(i).get("type_p_t")
.equalsIgnoreCase("t"))
questions.add(MainActivity.structure.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Structure/ Error Identification");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int random;
if (getIntent().getIntExtra("t_no", 0) == 19) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.vocab.size() - 11);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
Random r = new Random();
random = r.nextInt(MainActivity.structure.size() - 51);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.structure
.size() - 51);
}
Helper.sec_questions.add(random);
}
i.putExtra("q_no", random);
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
Details_data.why.add(questions
.get(getIntent().getIntExtra("q_no", 0))
.get("why").replace("#", ""));
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
} else if (getIntent().getIntExtra("t_no", 0) < 40) {
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < MainActivity.vocab.size(); i++) {
if (MainActivity.vocab.get(i).get("type_p_t")
.equalsIgnoreCase("t"))
questions.add(MainActivity.vocab.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Vocabulary");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int random;
if (getIntent().getIntExtra("t_no", 0) == 39) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.listining.size() - 4);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
Random r = new Random();
random = r.nextInt(MainActivity.vocab.size() - 11);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.vocab.size() - 11);
}
Helper.sec_questions.add(random);
}
i.putExtra("q_no", random);
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
} else if (getIntent().getIntExtra("t_no", 0) < 50) {
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
main_txt.setVisibility(View.GONE);
opt_a.setVisibility(View.GONE);
opt_b.setVisibility(View.GONE);
opt_c.setVisibility(View.GONE);
opt_d.setVisibility(View.GONE);
headset.setVisibility(View.VISIBLE);
for (int i = 0; i < MainActivity.listining.size(); i++) {
if (MainActivity.listining.get(i).get("type_p_t")
.equalsIgnoreCase("t"))
questions.add(MainActivity.listining.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Listening Comprehension");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int random;
if (getIntent().getIntExtra("t_no", 0) == 49) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
Random r = new Random();
random = r.nextInt(MainActivity.reading.size() - 1);
i.putExtra("paragraph_id", random + 1);
i.putExtra("q_no", 0);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
Random r = new Random();
random = r.nextInt(MainActivity.listining.size() - 4);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.listining
.size() - 4);
}
Helper.sec_questions.add(random);
i.putExtra("q_no", random);
}
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
listen.setVisibility(View.VISIBLE);
mp = new MediaPlayer();
listen.setOnClickListener(new OnClickListener() {
@SuppressLint("SdCardPath")
@Override
public void onClick(View v) {
try {
mp.setDataSource("/mnt/sdcard/qualification/"
+ questions.get(
getIntent().getIntExtra("q_no", 0))
.get("voice") + ".mp3");
mp.prepare();
mp.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
listen.setVisibility(View.GONE);
}
});
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
mp = null;
main_txt.setVisibility(View.VISIBLE);
opt_a.setVisibility(View.VISIBLE);
opt_b.setVisibility(View.VISIBLE);
opt_c.setVisibility(View.VISIBLE);
opt_d.setVisibility(View.VISIBLE);
headset.setVisibility(View.GONE);
}
});
} else if (getIntent().getIntExtra("t_no", 0) < 60) {
paragraph.setVisibility(View.VISIBLE);
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < MainActivity.reading_qst.size(); i++) {
if (MainActivity.reading_qst
.get(i)
.get("paragraph_id")
.equalsIgnoreCase(
String.valueOf(getIntent().getIntExtra(
"paragraph_id", 0) + 1)))
questions.add(MainActivity.reading_qst.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Reading Comprehension");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int random;
if (getIntent().getIntExtra("t_no", 0) == 59) {
i = new Intent(getApplicationContext(),
Practice_intruction.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.vid.size() - 1);
i.putExtra("Scene_ID", random + 1);
i.putExtra("q_no", 0);
} else if (getIntent().getIntExtra("t_no", 0) == 54) {
i = new Intent(getApplicationContext(),
Reading.class);
i.putExtra("type", "Test");
Random r = new Random();
random = r.nextInt(MainActivity.reading.size() - 1);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.reading.size() - 2);
}
Helper.sec_questions.add(random + 1);
i.putExtra("paragraph_id", random + 1);
i.putExtra("q_no", 0);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
i.putExtra("paragraph_id",
getIntent().getIntExtra("paragraph_id", 0));
i.putExtra("q_no",
getIntent().getIntExtra("q_no", 0) + 1);
}
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
}
else if (getIntent().getIntExtra("t_no", 0) < 100) {
final ArrayList<HashMap<String, String>> questions = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < MainActivity.vid_qst.size(); i++) {
if (MainActivity.vid_qst
.get(i)
.get("Scene_ID")
.equalsIgnoreCase(
String.valueOf(getIntent().getIntExtra(
"Scene_ID", 0) + 1)))
questions.add(MainActivity.vid_qst.get(i));
}
main_txt.setText("Q"
+ (getIntent().getIntExtra("t_no", 0) + 1)
+ ": "
+ questions.get(getIntent().getIntExtra("q_no", 0))
.get("question").replace("#", ""));
title.setText("Visual Comprehension");
opt_a_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[0]);
opt_b_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[1]);
opt_c_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[2]);
opt_d_txt.setText(questions
.get(getIntent().getIntExtra("q_no", 0)).get("choices")
.split("#")[3]);
cor_ans = questions.get(getIntent().getIntExtra("q_no", 0))
.get("cor_ans");
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (getIntent().getIntExtra("t_no", 0) == 99) {
i = new Intent(getApplicationContext(),
Practice_result.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
} else if (getIntent().getIntExtra("t_no", 0) == 59
|| getIntent().getIntExtra("t_no", 0) == 69
|| getIntent().getIntExtra("t_no", 0) == 79
|| getIntent().getIntExtra("t_no", 0) == 89) {
i = new Intent(getApplicationContext(), Video.class);
i.putExtra("type", "Test");
Random r = new Random();
int random = r.nextInt(MainActivity.vid.size() - 1);
while (Helper.sec_questions.contains(random)) {
random = r.nextInt(MainActivity.vid.size() - 1);
}
Helper.sec_questions.add(random + 1);
i.putExtra("Scene_ID", random + 1);
i.putExtra("q_no", 0);
} else {
i = new Intent(getApplicationContext(),
Struct.class);
i.putExtra("type",
getIntent().getStringExtra("type"));
i.putExtra("q_no",
getIntent().getIntExtra("q_no", 0) + 1);
i.putExtra("Scene_ID",
getIntent().getIntExtra("Scene_ID", 0));
}
i.putExtra("t_no",
getIntent().getIntExtra("t_no", 0) + 1);
if (ans.equalsIgnoreCase(cor_ans)) {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "true#");
} else {
i.putExtra("answers",
getIntent().getStringExtra("answers")
+ "false#");
}
i.putExtra("timer", timer_count);
Details_data.answers.add(ans);
Details_data.choices.add(opt_a_txt.getText().toString()
+ "#" + opt_b_txt.getText().toString() + "#"
+ opt_c_txt.getText().toString() + "#"
+ opt_d_txt.getText().toString());
Details_data.correct_answers.add(cor_ans);
Details_data.questions.add(main_txt.getText()
.toString());
running = false;
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
finish();
startActivity(i);
}
});
}
}
opt_a.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
opt_a_img.setImageResource(R.drawable.ans_sel_yallow);
opt_b_img.setImageResource(R.drawable.ans_sel_white);
opt_c_img.setImageResource(R.drawable.ans_sel_white);
opt_d_img.setImageResource(R.drawable.ans_sel_white);
ans = "a";
next.setVisibility(View.VISIBLE);
paragraph.setVisibility(View.GONE);
}
});
opt_b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
opt_a_img.setImageResource(R.drawable.ans_sel_white);
opt_b_img.setImageResource(R.drawable.ans_sel_yallow);
opt_c_img.setImageResource(R.drawable.ans_sel_white);
opt_d_img.setImageResource(R.drawable.ans_sel_white);
ans = "b";
next.setVisibility(View.VISIBLE);
paragraph.setVisibility(View.GONE);
}
});
opt_c.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
opt_a_img.setImageResource(R.drawable.ans_sel_white);
opt_b_img.setImageResource(R.drawable.ans_sel_white);
opt_c_img.setImageResource(R.drawable.ans_sel_yallow);
opt_d_img.setImageResource(R.drawable.ans_sel_white);
ans = "c";
next.setVisibility(View.VISIBLE);
paragraph.setVisibility(View.GONE);
}
});
opt_d.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
opt_a_img.setImageResource(R.drawable.ans_sel_white);
opt_b_img.setImageResource(R.drawable.ans_sel_white);
opt_c_img.setImageResource(R.drawable.ans_sel_white);
opt_d_img.setImageResource(R.drawable.ans_sel_yallow);
ans = "d";
next.setVisibility(View.VISIBLE);
paragraph.setVisibility(View.GONE);
}
});
back.setOnClickListener(new OnClickListener() {
@SuppressWarnings("deprecation")
@Override
public void onClick(View v) {
AlertDialog alert = new AlertDialog.Builder(Struct.this)
.create();
if (alert != null) {
alert.setMessage("Are you sure you want to exit?!");
alert.setCancelable(true);
alert.setButton("Yes",
new DialogInterface.OnClickListener() {
@SuppressLint("NewApi")
public void onClick(DialogInterface dialog,
int id) {
Intent i = new Intent(
getApplicationContext(),
MainMenu.class);
running = false;
if (countDownTimer != null) {
countDownTimer.cancel();
countDownTimer.onFinish();
countDownTimer = null;
}
finish();
startActivity(i);
}
});
alert.setButton2("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
}
});
alert.setCanceledOnTouchOutside(false);
alert.show();
TextView msg = (TextView) alert
.findViewById(android.R.id.message);
if (msg != null)
msg.setTextSize(20);
Button b1 = (Button) alert
.findViewById(android.R.id.button1);
if (b1 != null)
b1.setTextSize(20);
Button b2 = (Button) alert
.findViewById(android.R.id.button2);
if (b2 != null)
b2.setTextSize(20);
}
}
});
paragraph.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
i = new Intent(getApplicationContext(), Reading.class);
i.putExtra("type", getIntent().getStringExtra("type"));
i.putExtra("paragraph_id",
getIntent().getIntExtra("paragraph_id", 0));
i.putExtra("q_no", getIntent().getIntExtra("q_no", 0));
i.putExtra("t_no", getIntent().getIntExtra("t_no", 0));
i.putExtra("answers", getIntent().getStringExtra("answers"));
i.putExtra("timer", timer_count);
i.putExtra("return", true);
startActivity(i);
}
});
}
答案 0 :(得分：1)
似乎在任何情况下都会调用finish（）。但是，如果在取消之前将running设置为false，则finish（）方法不执行任何操作，因此它应该没问题。
running = false;
countdownTimer.cancel();
答案 1 :(得分：0)
请注意，在代码段中，您尝试在onFinish（）方法中取消计时器。这不是必需的，也不会对计时器产生任何影响。
此外，在Log.v("SomeTag", "onFinish() called");之上拨打onFinish()，在Log.v("SomeTag", "OnClick() called");之上拨打onClick()，然后检查logcat输出。您是否绝对确定onFinish()和onClick()实际上已被调用，而您所看到的并不是其他代码的副作用？请注意，finish();不会立即完成活动，而是仅在执行当前方法后返回。
答案 2 :(得分：0)
我已经基于@Ridcully回答做了自己的CountDownTimer：
public abstract class CustomCountDownTimer extends CountDownTimer {
public boolean running;
public CustomCountDownTimer(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
running = true;
}
@Override
public void onTick(long millisUntilFinished) {
tick(millisUntilFinished);
}
@Override
public void onFinish() {
if(running) {
finish();
}
}
public abstract void finish();
public abstract void tick(long millisUntilFinished);
public void stop(){
running = false;
cancel();
}
}
您现在应该调用stop（）而不是cancel（）