Java 如何在一个TableRow中显示两个字符串？

我的源代码中有两个值（时间选择器按钮中的currentHour和currentMinute），我想将它们组合成一个字符串，我可以在xml布局中显示（12:30，而不是12和30）。我已经能够编译下面的代码，但我遇到了困难，它强制关闭，我需要一些帮助：我只想添加一点代码，将currentHour和currentMinute组合成一个字符串，以便稍后在xml布局中从时间选择器调用时间

import android.app.Activity;
import android.app.AlertDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.ViewGroup;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.TimePicker;

public class AddEditCountry extends Activity {

    private long rowID; 
    private EditText nameEt;
    private EditText capEt;
    private EditText codeEt;
    private TimePicker timeEt;
    private TimePicker minEt;
    public static final String KEY_BUNDLE_TIME = "time";
    public static final String KEY_BUNDLE_MIN = "min";

    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.add_country);

        nameEt = (EditText) findViewById(R.id.nameEdit);
        capEt = (EditText) findViewById(R.id.capEdit);
        codeEt = (EditText) findViewById(R.id.codeEdit);
        timeEt = (TimePicker) findViewById(R.id.timeEdit);
        //   minEt = (TimePicker) findViewById(R.id.minEdit);


        Bundle extras = getIntent().getExtras(); 

        if (extras != null)
        {
            rowID = extras.getLong("row_id");
            nameEt.setText(extras.getString("name"));  
            capEt.setText(extras.getString("cap"));  
            codeEt.setText(extras.getString("code"));
            timeEt.setCurrentHour(extras.containsKey(KEY_BUNDLE_TIME) ? extras.getInt(KEY_BUNDLE_TIME) : 0);
            minEt.setCurrentMinute(extras.getInt("min"));
        }

        Button saveButton =(Button) findViewById(R.id.saveBtn);
        saveButton.setOnClickListener(new OnClickListener() {

            public void onClick(View v) 
            {
                if (nameEt.getText().length() != 0)
                {
                    AsyncTask<Object, Object, Object> saveContactTask = new AsyncTask<Object, Object, Object>() 
                    {
                        @Override
                        protected Object doInBackground(Object... params) 
                        {
                            saveContact();
                            return null;
                        }

                        @Override
                        protected void onPostExecute(Object result) 
                        {
                            finish();
                        }
                    }; 

                    saveContactTask.execute((Object[]) null); 
                }

                else
                {
                    AlertDialog.Builder alert = new AlertDialog.Builder(AddEditCountry.this);
                    alert.setTitle(R.string.errorTitle); 
                    alert.setMessage(R.string.errorMessage);
                    alert.setPositiveButton(R.string.errorButton, null); 
                    alert.show();
                }
            } 
        });
    }


    private void saveContact() 
    {
        DatabaseConnector dbConnector = new DatabaseConnector(this);

        if (getIntent().getExtras() == null)
        {
            dbConnector.insertContact(nameEt.getText().toString(),
                          capEt.getText().toString(),
                          timeEt.getCurrentHour().toString(),
                          minEt.getCurrentMinute().toString(),
                          codeEt.getText().toString());
        }
        else
        {
            dbConnector.updateContact(rowID,
                          nameEt.getText().toString(),
                          capEt.getText().toString(),
                          timeEt.getCurrentHour().toString(),
                          minEt.getCurrentMinute().toString(),/* Storing as String*/
                          codeEt.getText().toString());
        }
    }
}

LOGCAT:

03-24 00:48:57.779: D/Activity(6809): Activity.onPause(), editTextTapSensorList size: 0
03-24 00:48:57.959: I/Adreno200-EGLSUB(6809): <ConfigWindowMatch:2165>: Format RGBA_8888.
03-24 00:48:57.959: D/memalloc(6809): ion: Mapped buffer base:0x5ca41000 size:614400 offset:0 fd:54
03-24 00:48:58.049: D/memalloc(6809): ion: Mapped buffer base:0x5dc22000 size:614400 offset:0 fd:75
03-24 00:48:58.079: D/memalloc(6809): ion: Mapped buffer base:0x5dcb8000 size:614400 offset:0 fd:78
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5d4ce000 size:614400
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5d6f7000 size:614400
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5c929000 size:614400
03-24 00:49:10.623: W/dalvikvm(6809): threadid=12: thread exiting with uncaught exception (group=0x410889d8)
03-24 00:49:10.643: E/AndroidRuntime(6809): FATAL EXCEPTION: AsyncTask #2
03-24 00:49:10.643: E/AndroidRuntime(6809): java.lang.RuntimeException: An error occured while executing doInBackground()
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$3.done(AsyncTask.java:278)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.lang.Thread.run(Thread.java:856)
03-24 00:49:10.643: E/AndroidRuntime(6809): Caused by: java.lang.NullPointerException
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry.saveContact(AddEditCountry.java:101)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry.access$1(AddEditCountry.java:92)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry$1$1.doInBackground(AddEditCountry.java:65)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$2.call(AsyncTask.java:264)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
03-24 00:49:10.643: E/AndroidRuntime(6809):     ... 5 more
03-24 00:49:10.663: D/Activity(6809): Activity.onPause(), editTextTapSensorList size: 0
03-24 00:49:10.693: I/Adreno200-EGLSUB(6809): <ConfigWindowMatch:2165>: Format RGBA_8888.
03-24 00:49:10.693: D/memalloc(6809): ion: Mapped buffer base:0x5d4cb000 size:614400 offset:0 fd:57
03-24 00:49:10.713: D/memalloc(6809): ion: Mapped buffer base:0x5d8f7000 size:614400 offset:0 fd:68
03-24 00:49:10.753: D/memalloc(6809): ion: Mapped buffer base:0x5e14e000 size:614400 offset:0 fd:72
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5ca41000 size:614400
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5dc22000 size:614400
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5dcb8000 size:614400

03-24 00:48:57.779:D/Activity（6809）：Activity.onPause（），editTextTapSensorList大小：0
03-24 00:48:57.959:I/Adreno200 EGLSUB（6809）：：格式RGBA_8888。
03-24 00:48:57.959:D/memalloc（6809）：离子：映射缓冲区基址：0x5ca41000大小：614400偏移量：0 fd:54
03-24 00:48:58.049:D/memalloc（6809）：离子：映射的缓冲区基址：0x5dc22000大小：614400偏移量：0 fd:75
03-24 00:48:58.079:D/memalloc（6809）：离子：映射缓冲区基址：0x5dcb8000大小：614400偏移量：0 fd:78
03-24 00:48:58.079:D/memalloc（6809）：离子：取消映射缓冲区基：0x5d4ce000大小：614400
03-24 00:48:58.079:D/memalloc（6809）：离子：取消映射缓冲区基：0x5d6f7000大小：614400
03-24 00:48:58.079:D/memalloc（6809）：离子：取消映射缓冲区基：0x5c929000大小：614400
03-24 00:49:10.623:W/dalvikvm（6809）：threadid=12:线程退出时出现未捕获异常（组=0x410889d8）
03-24 00:49:10.643:E/AndroidRuntime（6809）：致命异常：AsyncTask#2
03-24 00:49:10.643:E/AndroidRuntime（6809）：java.lang.RuntimeException:执行doInBackground（）时出错
03-24 00:49:10.643:E/AndroidRuntime（6809）：在android.os.AsyncTask$3.done（AsyncTask.java:278）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.FutureTask$Sync.innerSetException（FutureTask.java:273）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.FutureTask.setException（FutureTask.java:124）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.FutureTask$Sync.innerRun（FutureTask.java:307）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在java.util.concurrent.FutureTask.run（FutureTask.java:137）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在android.os.AsyncTask$SerialExecutor$1.run（AsyncTask.java:208）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1076）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:569）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在java.lang.Thread.run（Thread.java:856）上
03-24 00:49:10.643:E/AndroidRuntime（6809）：由以下原因引起：java.lang.NullPointerException
03-24 00:49:10.643:E/AndroidRuntime（6809）：在com.nfc.linkingmanager.AddEditCountry.saveContact（AddEditCountry.java:101）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在com.nfc.linkingmanager.AddEditCountry.access$1（AddEditCountry.java:92）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在com.nfc.linkingmanager.AddEditCountry$1.doInBackground（AddEditCountry.java:65）
03-24 00:49:10.643:E/AndroidRuntime（6809）：在android.os.AsyncTask$2.call（AsyncTask.java:264）
03-24 00:49:10.643:E/AndroidRuntime（6809）：位于java.util.concurrent.FutureTask$Sync.innerRun（FutureTask.java:305）
03-24 00:49:10.643:E/AndroidRuntime（6809）：。。。还有5个
03-24 00:49:10.663:D/Activity（6809）：Activity.onPause（），editTextTapSensorList大小：0
03-24 00:49:10.693:I/Adreno200 EGLSUB（6809）：：格式RGBA_8888。
03-24 00:49:10.693:D/memalloc（6809）：离子：映射的缓冲区基址：0x5d4cb000大小：614400偏移量：0 fd:57
03-24 00:49:10.713:D/memalloc（6809）：离子：映射缓冲区基址：0x5d8f7000大小：614400偏移量：0 fd:68
03-24 00:49:10.753:D/memalloc（6809）：离子：映射缓冲区基址：0x5e14e000大小：614400偏移量：0 fd:72
03-24 00:49:10.753:D/memalloc（6809）：离子：取消映射缓冲区基：0x5ca41000大小：614400
03-24 00:49:10.753:D/memalloc（6809）：离子：取消映射缓冲区基：0x5dc22000大小：614400
03-24 00:49:10.753:D/memalloc（6809）：离子：取消映射缓冲区基：0x5dcb8000大小：614400

类似于

myHourVariable+”：“+myMinuteVariable”

？你能检查更新的尝试2并告诉我你看是否正确吗？（我正在尝试将时间选择器的currentHour和currentMinute组合成一个字符串）它正在崩溃…（强制关闭）从logcat粘贴堆栈跟踪如何？我更新了我的logcat（还有我的源代码，以及我现在所处的位置-我真的很感谢您的帮助-我已经在这个问题上纠缠了3天了，这让我发疯了）

03-24 00:48:57.779: D/Activity(6809): Activity.onPause(), editTextTapSensorList size: 0
03-24 00:48:57.959: I/Adreno200-EGLSUB(6809): <ConfigWindowMatch:2165>: Format RGBA_8888.
03-24 00:48:57.959: D/memalloc(6809): ion: Mapped buffer base:0x5ca41000 size:614400 offset:0 fd:54
03-24 00:48:58.049: D/memalloc(6809): ion: Mapped buffer base:0x5dc22000 size:614400 offset:0 fd:75
03-24 00:48:58.079: D/memalloc(6809): ion: Mapped buffer base:0x5dcb8000 size:614400 offset:0 fd:78
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5d4ce000 size:614400
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5d6f7000 size:614400
03-24 00:48:58.079: D/memalloc(6809): ion: Unmapping buffer  base:0x5c929000 size:614400
03-24 00:49:10.623: W/dalvikvm(6809): threadid=12: thread exiting with uncaught exception (group=0x410889d8)
03-24 00:49:10.643: E/AndroidRuntime(6809): FATAL EXCEPTION: AsyncTask #2
03-24 00:49:10.643: E/AndroidRuntime(6809): java.lang.RuntimeException: An error occured while executing doInBackground()
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$3.done(AsyncTask.java:278)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.lang.Thread.run(Thread.java:856)
03-24 00:49:10.643: E/AndroidRuntime(6809): Caused by: java.lang.NullPointerException
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry.saveContact(AddEditCountry.java:101)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry.access$1(AddEditCountry.java:92)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at com.nfc.linkingmanager.AddEditCountry$1$1.doInBackground(AddEditCountry.java:65)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at android.os.AsyncTask$2.call(AsyncTask.java:264)
03-24 00:49:10.643: E/AndroidRuntime(6809):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
03-24 00:49:10.643: E/AndroidRuntime(6809):     ... 5 more
03-24 00:49:10.663: D/Activity(6809): Activity.onPause(), editTextTapSensorList size: 0
03-24 00:49:10.693: I/Adreno200-EGLSUB(6809): <ConfigWindowMatch:2165>: Format RGBA_8888.
03-24 00:49:10.693: D/memalloc(6809): ion: Mapped buffer base:0x5d4cb000 size:614400 offset:0 fd:57
03-24 00:49:10.713: D/memalloc(6809): ion: Mapped buffer base:0x5d8f7000 size:614400 offset:0 fd:68
03-24 00:49:10.753: D/memalloc(6809): ion: Mapped buffer base:0x5e14e000 size:614400 offset:0 fd:72
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5ca41000 size:614400
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5dc22000 size:614400
03-24 00:49:10.753: D/memalloc(6809): ion: Unmapping buffer  base:0x5dcb8000 size:614400