I cann`t do any action on new activity
<p>I am new to android. I would like to ask you some question.</p>

<p>When I calling new activity from main activity by commands</p>

<pre><code>Intent myIntent = new Intent(v.getContext(), PolarView.class);
//startActivityForResult(myIntent, 0);
startActivityForResult(myIntent, 0);
finish();
</code></pre>

<p>then in new activity i cant do any action, e.g. such as button click
Both</p>

<pre><code>Button btnSeven = (Button) this.findViewById(R.id.btn7);
    btnSeven.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            InputStr = InputStr + "7";
        InputViewField.setText(InputStr);

        }
    });
}
</code></pre>

<p>and</p>

<pre><code>public void btn7_click(View v) {
        InputStr = InputStr + "7";
        InputViewField.setText(InputStr);
}
</code></pre>

<p>having defined android:onClick="btn7_click" in activity`s layout
where InputViewField is EditText object</p>

<p>In the first case new activity does not start, in the second case when I press this button, aplication crashes.</p>

<p>could you please help me?</p>

<p>Here is some last peace of logcat after change </p>

<pre><code>StartActivityForResult()
</code></pre>

<p>to</p>

<pre><code>StartActivity()
</code></pre>

<p>Logcat:</p>

<pre><code>D/MediaScanner(  153): opendir /system/media/ failed, errno: 2
D/MediaScanner(  153):  prescan time: 25225ms
D/MediaScanner(  153):     scan time: 162ms
D/MediaScanner(  153): postscan time: 48ms
D/dalvikvm(  109): GC freed 1920 objects / 95640 bytes in 160ms
D/MediaScanner(  153):    total time: 25435ms
D/MediaScannerService(  153): done scanning volume internal
D/MediaScannerService(  153): start scanning volume external
D/dalvikvm(   52): GREF has increased to 301
I/ActivityManager(   52): Starting activity: Intent { cmp=complex.ComplexCalc/.PolarView }
I/ActivityManager(   52): Displayed activity complex.ComplexCalc/.PolarView: 1414 ms (total 1414 ms)
V/MediaScanner(  153): pruneDeadThumbnailFiles... android.database.sqlite.SQLiteCursor@43bc30b8
V/MediaScanner(  153): /pruneDeadThumbnailFiles... android.database.sqlite.SQLiteCursor@43bc30b8
D/MediaScanner(  153):  prescan time: 1509ms
D/MediaScanner(  153):     scan time: 405ms
D/MediaScanner(  153): postscan time: 323ms
D/MediaScanner(  153):    total time: 2237ms
D/MediaScannerService(  153): done scanning volume external
D/AndroidRuntime(  223): Shutting down VM
W/dalvikvm(  223): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
E/AndroidRuntime(  223): Uncaught handler: thread main exiting due to uncaught exception
D/dalvikvm(  223): GC freed 3456 objects / 221888 bytes in 153ms
E/AndroidRuntime(  223): java.lang.IllegalStateException: Could not execute method of the activity
E/AndroidRuntime(  223):    at android.view.View$1.onClick(View.java:2031)
E/AndroidRuntime(  223):    at android.view.View.performClick(View.java:2364)
E/AndroidRuntime(  223):    at android.view.View.onTouchEvent(View.java:4179)
E/AndroidRuntime(  223):    at android.widget.TextView.onTouchEvent(TextView.java:6541)
E/AndroidRuntime(  223):    at android.view.View.dispatchTouchEvent(View.java:3709)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
E/AndroidRuntime(  223):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
E/AndroidRuntime(  223):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
E/AndroidRuntime(  223):    at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
E/AndroidRuntime(  223):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
E/AndroidRuntime(  223):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
E/AndroidRuntime(  223):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(  223):    at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(  223):    at android.app.ActivityThread.main(ActivityThread.java:4363)
E/AndroidRuntime(  223):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(  223):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(  223):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
E/AndroidRuntime(  223):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
E/AndroidRuntime(  223):    at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(  223): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime(  223):    at complex.ComplexCalc.PolarView.btn7_click(PolarView.java:266)
E/AndroidRuntime(  223):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(  223):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(  223):    at android.view.View$1.onClick(View.java:2026)
E/AndroidRuntime(  223):    ... 23 more
E/AndroidRuntime(  223): Caused by: java.lang.NullPointerException
E/AndroidRuntime(  223):    ... 27 more
I/Process (   52): Sending signal. PID: 223 SIG: 3
I/dalvikvm(  223): threadid=7: reacting to signal 3
I/dalvikvm(  223): Wrote stack trace to '/data/anr/traces.txt'
I/ARMAssembler(   52): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x46eae8:0x46eba4] in 1562593 ns
I/ARMAssembler(   52): generated scanline__00000177:03515104_00001001_00000000 [ 91 ipp] (114 ins) at [0x46eba8:0x46ed70] in 1903198 ns
I/Process (  223): Sending signal. PID: 223 SIG: 9
I/ActivityManager(   52): Process complex.ComplexCalc (pid 223) has died.
I/WindowManager(   52): WIN DEATH: Window{43cc3920 complex.ComplexCalc/complex.ComplexCalc.PolarView paused=false}
E/gralloc (   52): [unregister] handle 0x481778 still locked (state=40000001)
I/UsageStats(   52): Unexpected resume of com.android.launcher while already resumed in complex.ComplexCalc
W/InputManagerService(   52): Got RemoteException sending setActive(false) notification to pid 223 uid 10024
</code></pre>
