最后我得到了工作一个解决方案，解决我的问题：

在OnCreate中：

TextView tv_chart_menuvotes = (TextView) findViewById(R.id.tv_chart_menuvotes);

String csPrevThur = getPreviousThursday();

String csNextThur = getNextThursday();

tv_chart_menuvotes.setText("Vote from " + csPrevThur + " To "+ csNextThur);

的OnCreate中之外：

public String getPreviousThursday() {

String csDate = "";

int perSut = 0;

Calendar calendar = Calendar.getInstance();

int day = calendar.get(Calendar.DAY_OF_WEEK);

switch (day) {

case Calendar.SUNDAY:

perSut = -3;

break;

case Calendar.MONDAY:

perSut = -4;

break;

case Calendar.TUESDAY:

perSut = -5;

break;

case Calendar.WEDNESDAY:

perSut = -6;

break;

case Calendar.THURSDAY:

perSut = 0;

break;

case Calendar.FRIDAY:

perSut = -1;

break;

case Calendar.SATURDAY:

perSut = -2;

break;

}

SimpleDateFormat mDF = new SimpleDateFormat("dd-MM-yyyy");

calendar.add(Calendar.DAY_OF_MONTH, perSut);

csDate = mDF.format(calendar.getTime());

System.out.println("Prev Thursday >> " + csDate);

return csDate;

}

public String getNextThursday() {

String csDate = "";

int perSut = 0;

Calendar calendar = Calendar.getInstance();

int day = calendar.get(Calendar.DAY_OF_WEEK);

switch (day) {

case Calendar.SUNDAY:

perSut = 4;

break;

case Calendar.MONDAY:

perSut = 3;

break;

case Calendar.TUESDAY:

perSut = 2;

break;

case Calendar.WEDNESDAY:

perSut = 1;

break;

case Calendar.THURSDAY:

perSut = 7;

break;

case Calendar.FRIDAY:

perSut = 6;

break;

case Calendar.SATURDAY:

perSut = 5;

break;

}

SimpleDateFormat mDF = new SimpleDateFormat("dd-MM-yyyy");

calendar.add(Calendar.DAY_OF_MONTH, perSut);

csDate = mDF.format(calendar.getTime());

System.out.println("NextThursday >> " + csDate);

return csDate;

}