안드로이드 intent이용한 화면전환 질문입니다

Question

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public class MainActivity extends Activity {       EditText strEdit;     @Override     public void onCreate(Bundle savedInstanceState) {                   super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         strEdit = (EditText)findViewById(R.id.editText1);         Button launch=(Button)findViewById(R.id.button_1);         launch.setOnClickListener(new Button.OnClickListener(){             public void onClick(View v){                 Intent intent = new Intent(MainActivity.this,Activity2.class);                 startActivity(intent);             }         });     }       }

Main Activity입니다.

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public class Activity2 extends Activity {       @Override     public void onCreate(Bundle savedInstanceState) {         Log.d("MyTag", "Print Test Log3 : "+savedInstanceState);         super.onCreate(savedInstanceState);         Log.d("MyTag", "Print Test Log4"+R.layout.activity_activity2);         setContentView(R.layout.activity_activity2);         Log.d("MyTag", "Print Test Log5"); //      Intent intent = getIntent();         Log.d("MyTag", "Print Test Log6"); //      String str = intent.getExtras().getString("str").toString(); //      TextView tv = (TextView)findViewById(R.id.tv_2); //      tv.setText(str);     } }

로그를 찍어 보면

setContentView(R.layout.activity_activity2); 이 줄에서 에러가 나는데, 이유를 알 수가 없습니다. xml 레이아웃이 잘못된 건 아닐까 생각했는데, 다른 작동하는 xml파일로 바꾸어도 똑같은 에러가 납니다.

Answer 1

xml을 올려 봐 주세요. 제가 보기에는 xml에서 문제가 있는 것 같네요.

아니면 매니페스트에서 activity2가 등록이 되어있는지 확인 해 보세요.

매니페스트에서 인텐트가 추가 되지 않으면 인텐트가 넘어가지 않습니다.

Comments

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Activity2"
    android:orientation="vertical"
    android:weightSum="3"
    >
   
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        
        android:layout_weight="1"
        android:weightSum="4"
        android:text="@string/hello_world" >
        <View
          
            android:layout_height="fill_parent"
            android:background="#FF0000FF"
            android:layout_weight="1"/>
        <View
           
            android:layout_height="fill_parent"
            android:background="#FF00FF00"
            android:layout_weight="2"/>
        <View
           
            android:layout_height="fill_parent"
            android:background="#FFFF0000"
            android:layout_weight="1"/>
    </LinearLayout>
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_weight="1"
        android:weightSum="2"
        android:text="@string/hello_world" >
        <View
           
            android:layout_height="fill_parent"
            android:background="#FF00FFFF"
            android:layout_weight="1"/>
        <View
           
            android:layout_height="fill_parent"
            android:background="#FFFFFF00"
            android:layout_weight="1"/>
    </LinearLayout>
    <TextView
        android:id = "@+id/tv_2"
        android:background="#FFFF00FF"
        android:layout_width="fill_parent"
        android:layout_weight="1"
        
    />
   
    

</LinearLayout>

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xml입니다.. 살펴봐주셔서 감사합니다..

Answer 2

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:tools="http://schemas.android.com/tools"      android:layout_width="match_parent"      android:layout_height="match_parent"      tools:context=".Activity2"     android:orientation="vertical"      android:weightSum="3">            <LinearLayout          android:orientation="horizontal"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:layout_weight="1"          android:weightSum="4"          android:text="@string/hello_world" >          <View            android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:background="#FF0000FF"              android:layout_weight="1"/>          <View            android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:background="#FF00FF00"              android:layout_weight="2"/>          <View            android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:background="#FFFF0000"              android:layout_weight="1"/>      </LinearLayout>      <LinearLayout          android:orientation="horizontal"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:layout_weight="1"          android:weightSum="2"          android:text="@string/hello_world" >          <View            android:layout_width="fill_parent"               android:layout_height="fill_parent"              android:background="#FF00FFFF"              android:layout_weight="1"/>          <View              android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:background="#FFFFFF00"              android:layout_weight="1"/>      </LinearLayout>      <TextView          android:id = "@+id/tv_2"          android:background="#FFFF00FF"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:layout_weight="1"      /> </LinearLayout>

위와 같이 해보시기 바랍니다 되는거 확인 했습니다. layout_width와 layout_height가 빠져있네요. 이부분을 wrap_contant나 match_parent, fill_parent로 수정해보시기 바랍니다.