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POAndroid Error: android.widget.TextView.<init>
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  1. POAndroid Error: android.widget.TextView.<init>
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    copied!<p>i want to run the application in ma Galaxy S2 but i found this error. i post the logcat. please tell me what s the problem? and how to resolve it ? thanks</p> <pre><code>05-07 11:23:38.820: D/AndroidRuntime(8900): Shutting down VM 05-07 11:23:38.820: W/dalvikvm(8900): threadid=1: thread exiting with uncaught exception (group=0x40c3f1f8) 05-07 11:23:38.820: E/AndroidRuntime(8900): FATAL EXCEPTION: main 05-07 11:23:38.820: E/AndroidRuntime(8900): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.aaaaa/com.example.aaaaa.MainActivity}: java.lang.NullPointerException 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1892) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread.access$600(ActivityThread.java:127) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1159) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.os.Handler.dispatchMessage(Handler.java:99) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.os.Looper.loop(Looper.java:137) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread.main(ActivityThread.java:4507) 05-07 11:23:38.820: E/AndroidRuntime(8900): at java.lang.reflect.Method.invokeNative(Native Method) 05-07 11:23:38.820: E/AndroidRuntime(8900): at java.lang.reflect.Method.invoke(Method.java:511) 05-07 11:23:38.820: E/AndroidRuntime(8900): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 05-07 11:23:38.820: E/AndroidRuntime(8900): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 05-07 11:23:38.820: E/AndroidRuntime(8900): at dalvik.system.NativeStart.main(Native Method) 05-07 11:23:38.820: E/AndroidRuntime(8900): Caused by: java.lang.NullPointerException 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.content.ContextWrapper.getResources(ContextWrapper.java:81) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.view.View.&lt;init&gt;(View.java:2721) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.view.View.&lt;init&gt;(View.java:2769) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.widget.TextView.&lt;init&gt;(TextView.java:573) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.widget.TextView.&lt;init&gt;(TextView.java:566) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.widget.TextView.&lt;init&gt;(TextView.java:561) 05-07 11:23:38.820: E/AndroidRuntime(8900): at com.example.aaaaa.MainActivity.&lt;init&gt;(MainActivity.java:28) 05-07 11:23:38.820: E/AndroidRuntime(8900): at java.lang.Class.newInstanceImpl(Native Method) 05-07 11:23:38.820: E/AndroidRuntime(8900): at java.lang.Class.newInstance(Class.java:1319) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.Instrumentation.newActivity(Instrumentation.java:1026) 05-07 11:23:38.820: E/AndroidRuntime(8900): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1883) 05-07 11:23:38.820: E/AndroidRuntime(8900): ... 11 more </code></pre> <p>this is MainActivity.java I think that the error is in the <code>TextView view = new TextView(this);</code> because i dont have TextView in MainActivity but i want to extract data from textview in another class (setting.java)</p> <pre><code>import java.util.ArrayList; import java.util.List; import android.content.Intent; import android.database.Cursor; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import com.google.android.maps.GeoPoint; import com.google.android.maps.ItemizedOverlay; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.OverlayItem; public class MainActivity extends MapActivity { String num; TextView view = new TextView(this); public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Bundle extra = getIntent().getExtras(); num = extra.getString("label"); final TextView view = new TextView(this); Uri uriSMSURI = Uri.parse("content://sms/inbox"); Cursor cur = getContentResolver().query(uriSMSURI, null, null, null,null); String sms = ""; while (cur.moveToNext()) { String spn ="+21629188153"; String phNum =cur.getString(2); if (spn.equals(phNum)){ sms +=cur.getString(12); } } String a =sms.substring(0,10); String b =sms.substring(11,21); MapView maMap; MapController monControler; maMap = (MapView)findViewById(R.id.myGmap); maMap.setBuiltInZoomControls(true); GeoPoint point = new GeoPoint (microdegrees(Double.parseDouble(a)),microdegrees(Double.parseDouble(b))); MonOverlay object = new MonOverlay(getResources().getDrawable(R.drawable.marker_voisinage_rouge)); object.addPoint(point); maMap.getOverlays().add(object); maMap.setSatellite(true); monControler = maMap.getController(); monControler.setZoom(12); monControler.setCenter(point); Button monBouton = (Button)findViewById(R.id.envoie_sms); monBouton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { View monBoutton = null; // TODO Auto-generated method stub Intent monIntent = new Intent(MainActivity.this,SendSms.class); startActivity(monIntent); } } ); Button mnBouton = (Button)findViewById(R.id.setting); mnBouton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { View monBoutton = null; // TODO Auto-generated method stub setContentView(R.layout.setting); } } ); Button myBouton = (Button)findViewById(R.id.aff); myBouton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { View monBoutton = null; // TODO Auto-generated method stub view.setText(num); setContentView(view); } } ); } private int microdegrees (double value){ return (int)(value*1000000); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } public class MonOverlay extends ItemizedOverlay&lt;OverlayItem&gt;{ List&lt;GeoPoint&gt; points = new ArrayList&lt;GeoPoint&gt;(); public MonOverlay(Drawable arg0) { super(boundCenterBottom(arg0)); // TODO Auto-generated constructor stub } @Override protected OverlayItem createItem(int i) { GeoPoint point = points.get(i); return new OverlayItem(point,"titre","description"); } @Override public int size() { return points.size(); } public void addPoint (GeoPoint point){ this.points.add(point); populate(); } } } </code></pre> <p>this is Setting.java and i want to pass <code>s1 = num.getText().toString();</code> to MainActivity.java</p> <pre><code>import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; public class setting extends Activity { Button sauvg; EditText num; String s1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.setting); sauvg = (Button)findViewById(R.id.ok); num = (EditText)findViewById(R.id.editText1); sauvg.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent t = new Intent(setting.this, MainActivity.class); s1 = num.getText().toString(); t.putExtra("label",s1); startActivity(t); // TODO Auto-generated method stub } }); } } </code></pre>
 

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