android - runtime-error.Intent 受信時

Question

1. これは MainActivity です

   package com.example.createviews;
   import android.os.Bundle;
   import android.app.Activity;
   import android.content.Intent;
   import android.util.Log;
   import android.view.View;
   import android.view.View.OnClickListener;
   import android.widget.Button;
   import android.widget.EditText;
   
   public class MainActivity extends Activity {
   //ประกาศตัวแปร
   EditText inputname;
   EditText inputemail;
   Button log_in;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.linear_layout);
       // view matching
       inputname = (EditText) findViewById(R.id.name);
       inputemail = (EditText) findViewById(R.id.email);
       Button log_in = (Button) findViewById(R.id.log_in);
       // button event
       log_in.setOnClickListener(new View.OnClickListener(){
   
           @Override
           public void onClick(View arg0) {
               //starting a new intent
               Intent receiveData  =   new         Intent(getApplicationContext(),ReceiveDataActivity.class);
               //sent data to otheractivity
               receiveData.putExtra("name", inputname.getText().toString());
               receiveData.putExtra("email",inputemail.getText().toString());
   
               startActivity(receiveData);
           }
   
       });
   }
   }
   

   2.この ReceiveActivity パッケージ com.example.createviews;

   import android.app.Activity;
   import android.content.Intent;
   import android.os.Bundle;
   import android.util.Log;
   import android.view.View;
   import android.widget.Button;
   import android.widget.TextView;
   
   public class ReceiveDataActivity extends Activity {
   TextView txtname;
   TextView txtemail;
   Button close;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       // TODO Auto-generated method stub
       super.onCreate(savedInstanceState);
       //หน้าที่จะให้โชว์
       setContentView(R.layout.receivedata_layout);
       //view matching
        txtname = (TextView)findViewById(R.id.txtname);
        txtemail = (TextView)findViewById(R.id.txtemail);
        close = (Button)findViewById(R.id.close);
        //รับค่า intent
        Intent i = getIntent();
        String name = i.getStringExtra("name");
        String email = i.getStringExtra("email");
   
        //นำค่าที่รับมาแสดง
        txtname.setText(name);
        txtemail.setText(email);
   
        close.setOnClickListener(new View.OnClickListener() {
   
               public void onClick(View arg0) {
                   //Closing SecondScreen Activity
                   finish();
               }
           });
   }
   

   }

   これは私の logcat 出力です :: 08-17 16:51:55.064: E/AndroidRuntime(704): FATAL EXCEPTION: main

   08-17 16:51:55.064: E/AndroidRuntime(704): java.lang.RuntimeException: アクティビティ ComponentInfo を開始できません {com.example.createviews/com.example.createviews.MainActivity}: java.lang.ClassCastException: android .widget.TextView は android.widget.EditText にキャストできません

   08-17 16:51:55.064: E/AndroidRuntime (704): android.app.ActivityThread.performLaunchActivity (ActivityThread.java:1955) で

   08-17 16:51:55.064: E/AndroidRuntime (704): android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:1980) で

   08-17 16:51:55.064: E/AndroidRuntime(704): android.app.ActivityThread.access$600(ActivityThread.java:122) で

   08-17 16:51:55.064: E/AndroidRuntime(704): android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) で

   08-17 16:51:55.064: E/AndroidRuntime(704): android.os.Handler.dispatchMessage(Handler.java:99) で

   08-17 16:51:55.064: E/AndroidRuntime(704): android.os.Looper.loop(Looper.java:137)

   08-17 16:51:55.064: E/AndroidRuntime(704): android.app.ActivityThread.main(ActivityThread.java:4340) で

   08-17 16:51:55.064: E/AndroidRuntime(704): java.lang.reflect.Method.invokeNative(ネイティブ メソッド) で

   08-17 16:51:55.064: E/AndroidRuntime(704): java.lang.reflect.Method.invoke(Method.java:511) で

   08-17 16:51:55.064: E/AndroidRuntime(704): com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) で

   08-17 16:51:55.064: E/AndroidRuntime (704): com.android.internal.os.ZygoteInit.main (ZygoteInit.java:551) で

   08-17 16:51:55.064: E/AndroidRuntime(704): dalvik.system.NativeStart.main(ネイティブ メソッド) で

   08-17 16:51:55.064: E/AndroidRuntime(704): 原因: java.lang.ClassCastException: android.widget.TextView は android.widget.EditText にキャストできません

   08-17 16:51:55.064: E/AndroidRuntime (704): com.example.createviews.MainActivity.onCreate (MainActivity.java:23) で

   08-17 16:51:55.064: E/AndroidRuntime (704): android.app.Activity.performCreate (Activity.java:4465) で

   08-17 16:51:55.064: E/AndroidRuntime (704): android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1049) で

   08-17 16:51:55.064: E/AndroidRuntime (704): android.app.ActivityThread.performLaunchActivity (ActivityThread.java:1919) で

   08-17 16:51:55.064: E/AndroidRuntime(704): ... 11 詳細

Answer 1

置く代わりに

Intent receiveData  =   new Intent(getApplicationContext(),ReceiveDataActivity.class);

のように書いてみてください。

Intent receiveData  =   new Intent(MainActivity.this,ReceiveDataActivity.class);

logcat 入力後の編集:

問題はここにあります：

08-17 16:51:55.064: E/AndroidRuntime(704): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
08-17 16:51:55.064: E/AndroidRuntime(704): at com.example.createviews.MainActivity.onCreate(MainActivity.java:23)

linear_layout.xml を確認し、inputemail のウィジェット タイプかどうかを確認してください。TextView として指定している必要があります。EditText に変更します。