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我有一个名称列表视图（从数据库导入）。单击列表中的名称时，我想从数据库中获取名称的详细信息，因此我必须将名称传递给下一个要检索详细信息的类.我正在尝试将名称从一个班级传递给另一个班级。我不知道我是否传递错误的字符串或以错误的方式获取字符串的名称。

contact.java：

public class Contacts extends Activity implements OnClickListener {
    int NewContact_Request_Code = 1;
    Button newcontact;
    ListView listview;
    public static final String LOG_TAG = "Contacts";
    int mInt = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.contactview);// Set the content to contactview.xml

        // newcontact = NEW CONTACT button
        // listview = MyList List View
        newcontact = (Button) findViewById(R.id.baddcontact);
        listview = (ListView) findViewById(R.id.mylist);

        // Make a New Database
        DBContact info = new DBContact(this);
        // Open , get Information from database and close it
        info.open();
        String[] data = info.queryAll();
        info.close();
        // listview = getListView();
        listview.setTextFilterEnabled(true);
        // Display the names
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(Contacts.this,
                android.R.layout.simple_list_item_1, data);
        listview.setAdapter(adapter);
        listview.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?>listview, View view,
                    int position, long id) {

                String nameclicked = ((TextView)view).getText().toString();
                Intent viewintent = new Intent(Contacts.this, ViewContact.class);
                viewintent.putExtra("name_clicked", nameclicked);
                startActivity(viewintent);

            }
        });
        newcontact.setOnClickListener(this);

    }

    public void onClick(View v) {
        // TODO Auto-generated method stub
        Intent newintent = new Intent(Contacts.this, AddNewContact.class);
        // start activity for result - to get the name of the new contact
        startActivityForResult(newintent, 0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        // pass the value of the string via cursor and update the list
    }

}

viewcontact.java：

public class ViewContact extends Activity implements OnClickListener {
    Button ViewPPhone, ViewHPhone, ViewOPhone, EditContact;
    TextView ViewName;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.viewcontact);
        savedInstanceState = getIntent().getExtras();
        String name = savedInstanceState.getString("name_clicked");
        Long l = Long.parseLong(name);
        DBContact getdetails = new DBContact(this);
        getdetails.open();
        String returnedname = getdetails.getName(l);
        String returnedpphone = getdetails.getPphone(l);
        String returnedhphone = getdetails.getHphone(l);
        String returnedophone = getdetails.getOphone(l);
        getdetails.close();
        ViewName.setText(returnedname);
        ViewPPhone.setText(returnedpphone);
        ViewHPhone.setText(returnedhphone);
        ViewOPhone.setText(returnedophone);

        EditContact = (Button) findViewById(R.id.bEditContact);
        EditContact.setOnClickListener(this);
        ViewPPhone = (Button) findViewById(R.id.ViewPersonalPhoneNumber);
        ViewPPhone.setOnClickListener(this);
        ViewHPhone = (Button) findViewById(R.id.ViewHomePhoneNumber);
        ViewHPhone.setOnClickListener(this);
        ViewOPhone = (Button) findViewById(R.id.ViewOfficePhoneNumber);
        ViewOPhone.setOnClickListener(this);

    }

    public void onClick(View view) {
        // TODO Auto-generated method stub
        switch (view.getId()) {
        case R.id.ViewPersonalPhoneNumber:
        /*  Intent dialpersonalphone = new
            Intent(android.content.Intent.ACTION_DIAL,
            Uri.parse("returnedpphone"));
            startActivity(dialpersonalphone );*/
            break;

        case R.id.ViewHomePhoneNumber:
            /*Intent dialhome = new
            Intent(android.content.Intent.ACTION_DIAL,
            Uri.parse("returnedhphone"));
            startActivity(dialhome);*/
            break;

        case R.id.ViewOfficePhoneNumber:
            /*Intent dialoffice = new
            Intent(android.content.Intent.ACTION_DIAL,
            Uri.parse("returnedophone"));
            startActivity(dialoffice);*/
            break;

        case R.id.bEditContact:
            startActivity(new Intent("com.example.contactlist.EDITCONTACT"));
            break;
        }
    }

}

LOGCAT

10-02 10:30:23.064: E/AndroidRuntime(1045): FATAL EXCEPTION: main
10-02 10:30:23.064: E/AndroidRuntime(1045): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.contactlist/com.example.contactlist.ViewContact}: java.lang.NumberFormatException: Invalid long: "nishanth"
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.os.Looper.loop(Looper.java:137)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread.main(ActivityThread.java:4745)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.reflect.Method.invokeNative(Native Method)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.reflect.Method.invoke(Method.java:511)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at dalvik.system.NativeStart.main(Native Method)
10-02 10:30:23.064: E/AndroidRuntime(1045): Caused by: java.lang.NumberFormatException: Invalid long: "nishanth"
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.Long.invalidLong(Long.java:125)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.Long.parse(Long.java:362)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.Long.parseLong(Long.java:353)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at java.lang.Long.parseLong(Long.java:319)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at com.example.contactlist.ViewContact.onCreate(ViewContact.java:23)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.Activity.performCreate(Activity.java:5008)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-02 10:30:23.064: E/AndroidRuntime(1045):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-02 10:30:23.064: E/AndroidRuntime(1045):     ... 11 more
4

4 回答 4

1

当我使用捆绑包传递信息时，我发现我需要实例化一个os.Bundle对象，然后在将此捆绑包添加到意图之前继续填充我的捆绑包信息。

修改您的contact.java代码以读取；

    Intent viewintent = new Intent(Contacts.this, ViewContact.class);
    final Bundle bundle = new Bundle();
    bundle.putString("name_clicked", nameclicked);
    viewintent.putExtras(bundle);
    startActivity(viewintent);

并重新运行以查看是否有效。

编辑

问题是它String nameclicked = ((TextView)view).getText().toString();不返回一个长的 - 它返回联系人姓名，“nishanth”！这在 logcat 日志中很清楚，其中指出；

10-02 10:30:23.064: E/AndroidRuntime(1045): 由: java.lang.NumberFormatException: Invalid long: "nishanth"

返回的视图((TextView)view)不是电话号码，而是您的键“name_clicked”所暗示的联系人姓名。更改此视图以定位电话号码。请注意，电话号码可以包含“+”和“-”符号，因此这种检索所选电话号码的实现并非万无一失。

于 2012-10-02T09:28:18.877 回答
1

看到这个我们有想法使用setter和getter它非常有用这个lisk click

 list.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                      

                Object  ob = (Object) view.getTag();                 
                if(ob != null) 
                {                       
                    Data da = (Data) view.getTag();              
                    String a = da.getSelected();
                    String a1 = da.getfunction();
                    int a2 = da.getImage();

                    Log.i(" val one " ,"_" +a);
                    Log.i(" val two ", "_"  +a1);
                    Log.i(" val three","_" +a2); 

                    Intent intent = new Intent(ListMobileActivity.this, Display.class);                         
                    intent.putExtra("passed", a);
                    intent.putExtra("passed1", a1);     
                    intent.putExtra("passed2" ,a2);                      

                    startActivity(intent);          
                }
            }        
        });

这第二个活动

 TextView text = (TextView)findViewById(R.id.textView);
            TextView text1 = (TextView)findViewById(R.id.textView1);
            ImageView image = (ImageView)findViewById(R.id.imageView);

            message = getIntent().getExtras().getString("passed");
            message1 = getIntent().getExtras().getString("passed1");
            message2 = getIntent().getExtras().getInt("passed2");                          

            text.setText(message);
            text1.setText(message1);
            image.setBackgroundResource(message2);

这是 setter 和 getter 类

   public class Data {

    private String first;
    private String value;   
    private int image; 

    public void setSelected(String str) {
        this.first = str;
    }
    public String getSelected() {
        return first;
    }
    public void setfunction(String string) {
        this.value = string;
    }
    public String getfunction() {
        return value;
    }
    public void setImage(int image2) {
        this.image = image2;
    }
    public int getImage() {
        return image;
    }    

}
于 2012-10-02T09:32:27.437 回答
1

您正在尝试从savedInstanceState Bundle. 您想要做的是String从Intent开始的activity：

getIntent().getStringExtra("name_clicked");

编辑：

这可能是因为您试图将 解析String name为Long. 你确定名字都是数字吗？

如果您提供堆栈跟踪，也更容易查明问题

于 2012-10-02T09:19:38.953 回答
1

为了通过

viewintent.putExtra("name_clicked", nameclicked);

进入 viewcontact.java

String name = getIntent().getStringExtra("name_clicked");

编辑----------

您正在向另一个活动发送一个字符串，然后在捕获它之后尝试将该字符串转换为long。

出于这个原因，你得到NumberFormatException

请参阅ViewContact.java的 23 no line where you are conversion string to long。

Caused by: java.lang.NumberFormatException: Invalid long: "nishanth"

at com.example.contactlist.ViewContact.onCreate(ViewContact.java:23)
于 2012-10-02T09:19:52.433 回答