我的代码在这里调用我的圆列表，但是当我点击“第1轮”按钮时，没有任何反应，我没有得到任何错误，它只是不起作用，如果有人知道为什么会发生这种情况你可以请让我知道，谢谢。
public class MainActivity extends Activity implements OnClickListener {
public LinearLayout layout;
public LinearLayout roundList;
private Button round1, round2, round3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ScrollView scroll = new ScrollView(this);
setContentView(scroll);
layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);
scroll.addView(layout);
TextView title = new TextView(this);
title.setText("Select Round");
title.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 40);
title.setPadding(6,6,6,6);
title.setTextColor(Color.rgb(255, 150, 0));
title.setGravity(Gravity.CENTER);
layout.addView(title);
roundList = new LinearLayout(this);
roundList.setOrientation(LinearLayout.VERTICAL);
layout.addView(roundList);
Button round1 = new Button(this);
round1.setText("Round 1");
round1.setPadding(15, 15, 15, 15);
round1.setOnClickListener(this);
layout.addView(round1);
Button round2 = new Button(this);
round2.setText("Round 2");
round2.setPadding(15, 15, 15, 15);
round2.setOnClickListener(this);
layout.addView(round2);
Button round3 = new Button(this);
round3.setText("Round 3");
round3.setPadding(15, 15, 15, 15);
round3.setOnClickListener(this);
layout.addView(round3);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onClick(View v) {
if(v == round1) {
Intent round = new Intent(this, RoundList.class);
startActivity(round);
}
}//end onClick
}
这是我的RoundList类。
public class RoundList extends MainActivity implements RoundCallback {
public RoundList() {
TextView subTitle = new TextView(this);
subTitle.setText("Results");
subTitle.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 40);
subTitle.setPadding(6,6,6,6);
subTitle.setTextColor(Color.rgb(255, 150, 0));
subTitle.setGravity(Gravity.CENTER);
layout.addView(subTitle);
new GetRound(this);
}
public void addMatchup(JSONObject matchup) throws JSONException {
LinearLayout laid = new LinearLayout(this);
laid.setOrientation(LinearLayout.VERTICAL);
laid.setPadding(0, 0, 0, 20);
LinearLayout teams = new LinearLayout(this);
teams.setOrientation(LinearLayout.HORIZONTAL);
//teams.setWeightSum(1.0f);
LinearLayout teamHome = new LinearLayout(this);
teamHome.setOrientation(LinearLayout.VERTICAL);
teamHome.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT,
0.4f));
TextView teamHomeName = new TextView(this);
final String teamHomeStr = matchup.getJSONObject("teamHome").getString("name");
teamHomeName.setText(teamHomeStr);
teamHomeName.setTextAppearance(this, android.R.style.TextAppearance_Large);
teamHomeName.setGravity(Gravity.CENTER);
teamHome.addView(teamHomeName);
TextView teamHomeScore = new TextView(this);
teamHomeScore.setText(matchup.getJSONObject("result").getString("home"));
teamHomeScore.setTextAppearance(this, android.R.style.TextAppearance_Medium);
teamHomeScore.setGravity(Gravity.CENTER);
teamHome.addView(teamHomeScore);
teams.addView(teamHome);
TextView vs = new TextView(this);
vs.setText("vs");
vs.setTextAppearance(this, android.R.style.TextAppearance_Medium);
vs.setTextColor(Color.RED);
vs.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT,
0.65f));
vs.setGravity(Gravity.CENTER);
//vs.setBackgroundColor(Color.GREEN);
teams.addView(vs);
LinearLayout teamAway = new LinearLayout(this);
teamAway.setOrientation(LinearLayout.VERTICAL);
teamAway.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT,
0.4f));
TextView teamAwayName = new TextView(this);
final String teamAwayStr = matchup.getJSONObject("teamAway").getString("name");
teamAwayName.setText(teamAwayStr);
teamAwayName.setTextAppearance(this, android.R.style.TextAppearance_Large);
teamAwayName.setGravity(Gravity.CENTER);
teamAway.addView(teamAwayName);
TextView teamAwayScore = new TextView(this);
teamAwayScore.setText(matchup.getJSONObject("result").getString("away"));
teamAwayScore.setTextAppearance(this, android.R.style.TextAppearance_Medium);
teamAwayScore.setGravity(Gravity.CENTER);
teamAway.addView(teamAwayScore);
teams.addView(teamAway);
laid.addView(teams);
final String locationStr = matchup.getString("location");
TextView location = new TextView(this);
location.setText(locationStr);
location.setTextAppearance(this, android.R.style.TextAppearance_Medium);
location.setPadding(0,0,0,6);
location.setTextColor(Color.BLUE);
location.setGravity(Gravity.CENTER);
location.setClickable(true);
location.setOnClickListener(this);
laid.addView(location);
final String timeStr = matchup.getString("time");
TextView time = new TextView(this);
time.setText(timeStr);
time.setTextAppearance(this, android.R.style.TextAppearance_Medium);
time.setPadding(0,6,0,0);
time.setTextColor(Color.BLUE);
time.setGravity(Gravity.CENTER);
time.setClickable(true);
time.setOnClickListener(new OnClickListener() {
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
@Override
//Sends an appointment fixture to a calender
public void onClick(View v) {
Calendar beginTime = Calendar.getInstance();
beginTime.set(2012, 0, 19, 7, 30);
Calendar endTime = Calendar.getInstance();
endTime.set(2012, 0, 19, 8, 30);
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH);
Date date = null;
try {
date = formatter.parse(timeStr);
} catch (ParseException e) {
e.printStackTrace();
}
long dateInLong = date.getTime();
Intent intent = new Intent(Intent.ACTION_INSERT)
.setData(Events.CONTENT_URI)
.putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME, dateInLong)
.putExtra(CalendarContract.EXTRA_EVENT_END_TIME, dateInLong + 1000 * 60 * 60)
.putExtra(Events.TITLE, "Soccer match")
.putExtra(Events.DESCRIPTION, "Soccer match between "
+ teamHomeStr + " and " + teamAwayStr)
.putExtra(Events.EVENT_LOCATION, locationStr)
.putExtra(Events.AVAILABILITY, Events.AVAILABILITY_BUSY)
;
startActivity(intent);
}});
laid.addView(time);
roundList.addView(laid);
//get sms details and output to sms application
TextView sms = new TextView(this);
sms.setText("SMS Details");
sms.setTextAppearance(this, android.R.style.TextAppearance_Medium);
sms.setPadding(0,6,0,0);
sms.setTextColor(Color.DKGRAY);
sms.setGravity(Gravity.CENTER);
sms.setClickable(true);
sms.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String uri= "smsto:";
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(uri));
intent.putExtra("sms_body", "\"" + teamHomeStr + " vs " + teamAwayStr + "\n" + locationStr + "\n" + timeStr + "\"");
intent.putExtra("compose_mode", true);
startActivity(intent);
}});
laid.addView(sms);
}
@Override
public void roundCallback(JSONObject obj) {
JSONArray matchups;
try {
matchups = obj.getJSONArray("matchups");
for (int i = 0; i < matchups.length(); i++) {
JSONObject matchup = matchups.getJSONObject(i);
addMatchup(matchup);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
//Locates the location using Google maps.
public void onClick(View obj) {
if (obj instanceof TextView) {
TextView txt = (TextView) obj;
String uri = "geo:0,0?q=" + txt.getText().toString().replace(' ', '+');
startActivity(new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(uri)));
}
}
}
答案 0 :(得分：4)
你的代码应该是
round1 = new Button(this);
round2 = new Button(this);
round3 = new Button(this);
而不是
Button round1 = new Button(this);
Button round2 = new Button(this);
Button round3 = new Button(this);
在您的代码中，您隐藏了会员班round1，round2，round3在onCreate方法
答案 1 :(得分：0)
单击按钮时未启动其他活动的原因是您在OnClick()方法中检入的按钮为never clicked。
您正在创建local button object round1 in OnCreate()方法，而不是实例化整个类可见的round1按钮对象。因此，当OnCreate（）方法超出范围时，本地按钮对象也会被垃圾收集器销毁和收集。
要解决此问题，请在Button方法之前删除round1,round2, round3 in OnCreate()，并解决您的问题。