我现在尝试在单击按钮后添加一个对话框。当我单击是时，它应该导航到另一个页面，如果没有它将保留在页面上。
我尝试将对话框添加到按钮中，但它给了我错误。我不确定我该怎么办。
请帮忙。
MenuActivity.java
public class MenuActivity extends Activity {
private String server = "http://172.16.156.56";
private String sql_table = "orders";
private ListView list;
private String txtOrder, txtMember, txtPrice;
private Button btnAdd;
ArrayList<String> rows;
ListView listView1;
Button btnSubmit;
ArrayList<CustomItem> itemList, selectedList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
list=(ListView) findViewById(R.id.listView);
btnAdd = (Button)findViewById(R.id.button);
rows = new ArrayList<String>();
itemList=new ArrayList<CustomItem>();
itemList.add(new CustomItem("Fried Rice","description","1","Quantity"));
itemList.add(new CustomItem("Fried Noodle","description","2","Quantity"));
itemList.add(new CustomItem("Prawn noodle","description","3","Quantity"));
itemList.add(new CustomItem("Chicken Rice","description","4","Quantity"));
int[] prgmImages={R.drawable.friedrice,R.drawable.friednoodle,R.drawable.pnoodle,R.drawable.chickenrice};
listView1 = (ListView) findViewById(R.id.listView);
final CustomLVAdapter customLVAdapter = new CustomLVAdapter(this, itemList,prgmImages);
listView1.setAdapter(customLVAdapter);
Bundle extras = getIntent().getExtras();
final String strMem = extras.getString("Mem");
btnSubmit = (Button) findViewById(R.id.button);
btnSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
StringBuffer responseText = new StringBuffer();
selectedList = new ArrayList<CustomItem>();
int total = 0;
for (int i = 0; i < itemList.size(); i++) {
CustomItem object = itemList.get(i);
if (object.isSelected()) {
responseText.append(object.getItem() + "," + object.getQty() + ",");//item
selectedList.add(object);
//calculate price
total = total + Integer.parseInt(object.getQty()) * Integer.parseInt(object.getPrice());
}
}
txtOrder = responseText.toString();
txtPrice = String.valueOf(total);
Add(responseText.toString(), strMem, String.valueOf(total));
Intent i = new Intent(v.getContext(), ReceiptActivity.class);
i.putExtra("Order",txtOrder);
i.putExtra("Price",txtPrice);
i.putExtra("Mem",strMem);
startActivity(i);
Toast.makeText(getApplicationContext(), responseText + " $" + total,
Toast.LENGTH_SHORT).show();
confirmdialog();
SelectAll();
//store in database
//go to ReceiptActivity - membership, item, totalprice
}
private void confirmdialog() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(MenuActivity.this);
// Setting Dialog Title
alertDialog.setTitle("Confirmation");
// Setting Dialog Message
alertDialog.setMessage("Submit order?");
// Setting Positive "Yes" Button
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
//whatever you want to do
Intent i = new Intent(getApplicationContext(), ReceiptActivity.class);
}
});
// Setting Negative "NO" Button
alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//cancel the dialog
dialog.cancel();
}
});
alertDialog.show();
}
});
}
public void Add(final String item, final String membership, final String price)
{
RequestQueue MyRequestQueue = Volley.newRequestQueue(this);
String url = server + "/insertorder.php";
StringRequest MyStringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
protected Map<String, String> getParams() {
Map<String, String> MyData = new HashMap<String, String>();
MyData.put("item",item );
MyData.put("membership",membership );
MyData.put("price",price );
return MyData;
}
};
MyRequestQueue.add(MyStringRequest);
SelectAll();
}
public void SelectAll()
{
RequestQueue MyRequestQueue = Volley.newRequestQueue(this);
String url = server + "/fetchorder.php";
StringRequest MyStringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
JSONArray jsonMainNode = jsonResponse.optJSONArray(sql_table);
rows.clear();
for(int i=0; i < jsonMainNode.length(); i++)
{
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String order = jsonChildNode.optString("item").toString();
String membership = jsonChildNode.optString("membership").toString();
String price = jsonChildNode.optString("price").toString();
rows.add(order + ", " + membership + ", " + price );
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MenuActivity.this,
android.R.layout.simple_list_item_1, rows);
list.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() { //Create an error listener to handle errors appropriately.
@Override
public void onErrorResponse(VolleyError error) {
//This code is executed if there is an error.
}
});
MyRequestQueue.add(MyStringRequest);
}
}
logcat的
07-07 16:43:37.425 8696-9039/com.example.android.cardemulation E/AndroidRuntime_3_crash: crash in the same process: Thread-2418
java.lang.OutOfMemoryError: Failed to allocate a 493188205 byte allocation with 16777104 free bytes and 142MB until OOM
at com.android.volley.toolbox.DiskBasedCache.streamToBytes(DiskBasedCache.java:316)
at com.android.volley.toolbox.DiskBasedCache.readString(DiskBasedCache.java:526)
at com.android.volley.toolbox.DiskBasedCache.readStringStringMap(DiskBasedCache.java:549)
at com.android.volley.toolbox.DiskBasedCache$CacheHeader.readHeader(DiskBasedCache.java:392)
at com.android.volley.toolbox.DiskBasedCache.initialize(DiskBasedCache.java:155)
at com.android.volley.CacheDispatcher.run(CacheDispatcher.java:84)
07-07 16:43:37.478 8696-8696/com.example.android.cardemulation E/WindowManager: android.view.WindowLeaked: Activity com.example.android.cardemulation.MenuActivity has leaked window com.android.internal.policy.PhoneWindow$DecorView{7727bec V.E...... R....... 0,0-1026,543} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:397)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:299)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:319)
at android.app.AlertDialog$Builder.show(AlertDialog.java:1112)
at com.example.android.cardemulation.MenuActivity$1.confirmdialog(MenuActivity.java:154)
at com.example.android.cardemulation.MenuActivity$1.onClick(MenuActivity.java:116)
at android.view.View.performClick(View.java:5226)
at android.view.View$PerformClick.run(View.java:21266)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:168)
at android.app.ActivityThread.main(ActivityThread.java:5845)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:797)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687)