android null pointer exception

android

 package cn.example.vstdemo; 

import java.util.ArrayList; 
import java.util.List; 

import android.app.Activity; 
import android.content.Intent; 
import android.graphics.BitmapFactory; 
import android.graphics.Matrix; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.view.ViewPager.OnPageChangeListener; 
import android.util.DisplayMetrics; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.View.OnFocusChangeListener; 
import android.view.ViewGroup; 
import android.view.animation.Animation; 
import android.view.animation.TranslateAnimation; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MainActivity extends Activity implements OnFocusChangeListener, 
OnClickListener {

private TextView tv_newFilm, tv_networkTV, tv_category, tv_myFavourite, 
tv_application, tv_setting; 
private ImageView img1, img2, img3, img4, img5, img_cursor; 

private List  views; / / Tab page list 
private int offset = 0; / / animated pictures offset 
private int currIndex = 0; / / this page card number 
private int bmpW; / / animated image width 
private View view1, view2, view3, view4, view5, view6; 

private ViewPager viewPager; 
private MyViewPagerAdapter adapter; 

@ Override 
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); 
setContentView (R.layout.activity_main); 


InitImageView (); 
InitViewPager (); 

} 

public void init () {
tv_newFilm = (TextView) findViewById (R.id.tv_newFilm); 
tv_networkTV = (TextView) findViewById (R.id.tv_networkTV); 
tv_category = (TextView) findViewById (R.id.tv_category); 
tv_myFavourite = (TextView) findViewById (R.id.tv_myFavourite); 
tv_application = (TextView) findViewById (R.id.tv_application); 
tv_setting = (TextView) findViewById (R.id.tv_setting); 

img1 = (ImageView) findViewById (R.id.imageView1); 
img2 = (ImageView) findViewById (R.id.imageView2); 
img3 = (ImageView) findViewById (R.id.imageView3); 
img4 = (ImageView) findViewById (R.id.imageView4); 
img5 = (ImageView) findViewById (R.id.imageView5); 
img_cursor = (ImageView) findViewById (R.id.cursor); 

tv_newFilm.setOnFocusChangeListener (this); 
tv_networkTV.setOnFocusChangeListener (this); 
tv_category.setOnFocusChangeListener (this); 
tv_myFavourite.setOnFocusChangeListener (this); 
tv_application.setOnFocusChangeListener (this); 
tv_setting.setOnFocusChangeListener (this); 

img1.setOnClickListener (this); 
img2.setOnClickListener (this); 
img3.setOnClickListener (this); 
img4.setOnClickListener (this); 
img5.setOnClickListener (this); 
} 

private void InitViewPager () {
viewPager = (ViewPager) findViewById (R.id.viewPager); 
views = new ArrayList  (); 
LayoutInflater inflater = getLayoutInflater (); 
view1 = inflater.inflate (R.layout.newfilm, null); 
view2 = inflater.inflate (R.layout.networktv, null); 
view3 = inflater.inflate (R.layout.category, null); 
view4 = inflater.inflate (R.layout.myfavourite, null); 
view5 = inflater.inflate (R.layout.application, null); 
view6 = inflater.inflate (R.layout.mysetting, null); 

views.add (view1); 
views.add (view2); 
views.add (view3); 
views.add (view4); 
views.add (view5); 
views.add (view6); 

viewPager.setAdapter (new MyViewPagerAdapter (views)); 
viewPager.setCurrentItem (0); 
viewPager.setOnPageChangeListener (new MyOnPageChangeListener ()); 
} 

private void InitImageView () {
bmpW = BitmapFactory.decodeResource (getResources (), 
R.drawable.title_selector). GetWidth () ;/ / Get image width 
DisplayMetrics dm = new DisplayMetrics (); 
getWindowManager () getDefaultDisplay () getMetrics (dm);.. 
int screenW = dm.widthPixels ;/ / get resolution width 
offset = (screenW / 3 - bmpW) / 2 ;/ / calculate the offset 
Matrix matrix = new Matrix (); 
matrix.postTranslate (offset, 0); 
img_cursor.setImageMatrix (matrix) ;/ / animate the initial position 
} 

public class MyViewPagerAdapter extends PagerAdapter {
private List  mListViews; 

public MyViewPagerAdapter (List  mListViews) {
this.mListViews = mListViews; 
} 

@ Override 
public void destroyItem (ViewGroup container, int position, Object object) {
container.removeView (mListViews.get (position)); 
} 

@ Override 
public Object instantiateItem (ViewGroup container, int position) {
container.addView (mListViews.get (position), 0); 
return mListViews.get (position); 
} 

@ Override 
public int getCount () {
return mListViews.size (); 
} 

@ Override 
public boolean isViewFromObject (View arg0, Object arg1) {
return arg0 == arg1; 
} 
} 

public class MyOnPageChangeListener implements OnPageChangeListener {

int one = offset * 2 + bmpW ;/ / Page Card 1 -> Page 2 offset 
 cardint two = one * 2 ;/ / Page Card 1 -> Page 3 card offset 

public void onPageScrollStateChanged (int arg0) {

} 

public void onPageScrolled (int arg0, float arg1, int arg2) {

} 

public void onPageSelected (int arg0) {

Animation animation = new TranslateAnimation (one * currIndex, one 
* Arg0, 0, 0) ;/ / Obviously, this is relatively simple, only one line of code. 
currIndex = arg0; 
animation.setFillAfter (true) ;/ / True: stop animated images in end position 
animation.setDuration (300); 
img_cursor.startAnimation (animation); 
Toast.makeText (MainActivity.this, 
"You have selected" + viewPager.getCurrentItem () + "page card", 
. Toast.LENGTH_SHORT) show (); 
} 

} 

@ Override 
public boolean onCreateOptionsMenu (Menu menu) {
/ / Inflate the menu; this adds items to the action bar if it is present 
.getMenuInflater () inflate (R.menu.main, menu);. 
return true; 
} 

@ Override 
public void onClick (View v) {
Intent intent = new Intent (); 
intent.setClass (MainActivity.this, DetailActivity.class); 

switch (v.getId ()) {
case R.id.imageView1: 
/ / Img1.setAlpha (200); 
startActivity (intent); 
break; 
case R.id.imageView2: 
/ / Img2.setAlpha (200); 
startActivity (intent); 
break; 
case R.id.imageView3: 
/ / Img3.setAlpha (200); 
startActivity (intent); 
break; 
case R.id.imageView4: 
startActivity (intent); 
break; 
case R.id.imageView5: 
startActivity (intent); 
break; 
default: 
; 
} 
} 

@ Override 
public void onFocusChange (View v, boolean hasFocus) {
switch (v.getId ()) {
case R.id.tv_newFilm: 
/ / Tv_newFilm.setBackgroundResource (R.drawable.select); 
tv_newFilm.requestFocus (); 
tv_newFilm.setAlpha (200); 
tv_newFilm.setNextFocusRightId (R.id.tv_networkTV); 
tv_newFilm.setNextFocusDownId (R.id.imageView1); 

/ / 
tv_newFilm.setNextFocusRightId (R.id.tv_networkTV); 
case R.id.tv_networkTV: 
tv_networkTV.requestFocus (); 
tv_networkTV.setNextFocusLeftId (R.id.tv_newFilm); 
tv_networkTV.setNextFocusRightId (R.id.tv_category); 
case R.id.tv_category: 
tv_category.requestFocus (); 
tv_category.setNextFocusLeftId (R.id.tv_networkTV); 
tv_category.setNextFocusRightId (R.id.tv_myFavourite); 
case R.id.tv_myFavourite: 
tv_myFavourite.requestFocus (); 
tv_myFavourite.setNextFocusLeftId (R.id.tv_category); 
tv_myFavourite.setNextFocusRightId (R.id.tv_application); 
case R.id.tv_application: 
tv_application.requestFocus (); 
tv_application.setNextFocusLeftId (R.id.tv_myFavourite); 
tv_application.setNextFocusRightId (R.id.tv_setting); 
case R.id.tv_setting: 
tv_setting.requestFocus (); 
tv_setting.setNextFocusLeftId (R.id.tv_application); 
default: 
; 
} 
} 

/ / Private class MyViewPagerAdapter extends FragmentPagerAdapter {
/ / 
/ / Public MyViewPagerAdapter () {
/ / Super (getSupportFragmentManager ()); 
/ /} 
/ / 
/ / @ Override 
/ / Public Fragment getItem (int pageNumber) {
/ / Switch (pageNumber) {
/ / Case 0: 
/ / Return new newFilmFragment (); 
/ / Case 1: 
/ / Return new networkTVFragment (); 
/ / Case 2: 
/ / Return new categoryFragment (); 
/ / Case 3: 
/ / Return new myFavouriteFragment (); 
/ / Case 4: 
/ / Return new applicationFragment (); 
/ / Case 5: 
/ / Return new mysettingFragment (); 
/ / Default: 
/ / Return null; 
/ /} 
/ /} 

} 

This error has been running on the crash, I do not know how to solve, seeking God, you big<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
See error messages should be the place of the exception. Check BitmapFactory.decodeResource
private void InitImageView () {
bmpW = BitmapFactory.decodeResource (getResources (),
R.drawable.title_selector). GetWidth () ;/ / Get image width
DisplayMetrics dm = new DisplayMetrics ();
getWindowManager () getDefaultDisplay () getMetrics (dm);..
int screenW = dm.widthPixels ;/ / get resolution width
offset = (screenW / 3 - bmpW) / 2 ;/ / calculate the offset
Matrix matrix = new Matrix ();
matrix.postTranslate (offset, 0);
img_cursor.setImageMatrix (matrix) ;/ / animate the initial position
}

Reply:

 bmpW = BitmapFactory.decodeResource (getResources (), 
R.drawable.title_selector). GetWidth () ;/ / Get image width 

Reported null pointer exception here, check the position title_selector put the picture right, etc.
Reply:

reference to the second floor tantahe reply:

 bmpW = BitmapFactory.decodeResource (getResources (), 
R.drawable.title_selector). GetWidth () ;/ / Get image width 

Reported null pointer exception here, check the position title_selector put the picture right, etc.

Just want to be viewpager sliding effect, drawable wrote that no problem ah. What is that reason? Commented tried this, no problem
Reply:
Found,,

 private void InitImageView () {
img_cursor = (ImageView) findViewById (R.id.cursor); 
bmpW = BitmapFactory.decodeResource (getResources (), 
R.drawable.select). GetWidth () ;/ / Get image width 
DisplayMetrics dm = new DisplayMetrics (); 
getWindowManager () getDefaultDisplay () getMetrics (dm);.. 
int screenW = dm.widthPixels ;/ / get resolution width 
offset = (screenW / 6 - bmpW) / 2 ;/ / calculate the offset 
Matrix matrix = new Matrix (); 
matrix.postTranslate (offset, 0); 
img_cursor.setImageMatrix (matrix) ;/ / animate the initial position 
} 

Write the first line in this function, we can, in the prior written another function.
Reply:

 bmpW = BitmapFactory.decodeResource (getResources (), 
R.drawable.title_selector). GetWidth () ;/ / Get image width 

The landlord here:

 BitmapFactory.decodeResource (getResources (), 
R.drawable.title_selector) 

Return to this picture when decoding an empty Bitmap object, perhaps the problem is in title_selector this picture, this picture you put what?
Are xml files? Just one. Png format images?