Android Application Crashes ActivityManager permission Denied on Eclipse

Question

My Application is crashing every time when I Run it. only HelloWorld app runs fine.

It says Activity Manager permission denied. Please have a look.

Console :

1.[2016-04-18 17:21:21 - Demo] ActivityManager: open: Permission denied

1. [2016-04-18 17:21:21 - Demo] ActivityManager:

Starting: Intent
act=android.intent.action.MAIN cat=
[android.intent.category.LAUNCHER]
cmp=com.example.demo/.MainActivity

and here is my LogCat File..
Android LogCat

And Here is my MainActivity.java

public class MainActivity extends Activity implements OnClickListener {

EditText et = (EditText)findViewById(R.id.editText1);

Button btn = (Button)findViewById(R.id.button1);

TextView tv = (TextView)findViewById(R.id.textView1);



@Override

protected void onCreate(Bundle savedInstanceState) {

btn.setOnClickListener(this);



super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}



@Override

public void onClick(View v) {

tv.setText(et.getText().toString());

}}

and Here is my Manifest File.

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.demo"

 android:versionCode="1"

android:versionName="1.0" >



<uses-sdk

android:minSdkVersion="14"

android:targetSdkVersion="19" />



<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme">

<activity

android:name=".MainActivity"

android:label="@string/app_name" >



<intent-filter>

<action android:name="android.intent.action.MAIN" />                

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

<intent-filter></intent-filter>

</activity>

</application>

</manifest>

Answer 1

Ui is created in onCreate method of activity

public class MainActivity extends Activity implements OnClickListener {
     EditText et;
     Button btm;
     TextView tv;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          et = (EditText)findViewById(R.id.editText1);
          btm = (Button)findViewById(R.id.button1);
          tv = (TextView)findViewById(R.id.textView1);
          btm.setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {
         if(v.getId==btm.getId()) tv.setText(et.getText().toString());
     }
}

Android Application Crashes ActivityManager permission Denied on Eclipse

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