Android So rufen Sie eine Telefonnummer mit CardView OnClick Methode

Question

Ich versuche, Nummern von meiner App durch Klicken auf andere CardViews zu wählen, aber es funktioniert nicht für mich.

Jedes Mal, wenn ich versuchte, eine Absicht hinzuzufügen, wird die startActivity rot und Pop-out-Fehlermeldung "kann Methode nicht auflösen". Ich habe sogar versucht, Kontext vor der startActivity() hinzuzufügen, aber es stürzt die App ab.

Ich habe 4 CardViews, um einen Anruf und Ich habe 3 Java-Klassen zu initiieren angeklickt werden: CardViewDataAdapter wo der recyclerView Halter wurde erklärt, MainActivity und itemObject In activity_main verwendet i recycler_view. In cardview_row verwendete ich card_view und binde es mit der Recycler-Ansicht.

Bitte bitte helfen Sie mir, ich habe dieses Problem gegoogelt und auch auf Stack-Überlauf gesucht, aber keine Lösung gefunden.

The error message image

CardViewDataAdapter.java Code:

public class CardViewDataAdapter extends RecyclerView.Adapter<CardViewDataAdapter.ViewHolder> { 

    private List<ItemObject> itemList; 

    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ 
     // each data item is a string and an image in this case 
     public ImageView image_view; 
     public TextView image_name; 
     private Context context; 

     public ViewHolder(View itemLayoutView) { 

      super(itemLayoutView); 
      this.image_view = (ImageView) itemLayoutView.findViewById(R.id.image_view); 
      this.image_name = (TextView) itemLayoutView.findViewById(R.id.image_name); 

      // Store the context 
      this.context = context; 
      // Attach a click listener to the entire row view 
      itemLayoutView.setOnClickListener(this); 
     } 

     // Handles the row being being clicked 
     @Override 
     public void onClick(View view) { 

      if (getPosition() == 0){ 
       Intent callIntent = new Intent(Intent.ACTION_DIAL); 
       callIntent.setData(Uri.parse("tel:123456789")); 
       startActivity(callIntent); 
      } else if (getPosition() == 1){ 
       Toast.makeText(view.getContext(), "position2 = " + getPosition(), Toast.LENGTH_SHORT).show(); 
      } else if (getPosition() == 2){ 
       Toast.makeText(view.getContext(), "position3 = " + getPosition(), Toast.LENGTH_SHORT).show(); 
      } else { 
       Toast.makeText(view.getContext(), "position4 = " + getPosition(), Toast.LENGTH_SHORT).show(); 
      } 
      //context.startActivity(intent); 
     } 
    } 

    // Create new views (invoked by the layout manager) 
    @Override 
    public CardViewDataAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, 
                  int viewType) { 
     // create a new view 
     View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
       R.layout.cardview_row, null); 


     // create ViewHolder 
     ViewHolder viewHolder = new ViewHolder(itemLayoutView); 
     return viewHolder; 
    } 

    // Replace the contents of a view (invoked by the layout manager) 
    @Override 
    public void onBindViewHolder(ViewHolder viewHolder, int position) { 

     // - get data from your itemsData at this position 
     // - replace the contents of the view with that itemsData 
     viewHolder.image_view.setImageResource(itemList.get(position).getPhoto()); 
     viewHolder.image_name.setText(itemList.get(position).getName()); 


    } 

    // Return the size of your dataset (invoked by the layout manager) 
    @Override 
    public int getItemCount() { 
     return this.itemList.size(); 
    } 

    public CardViewDataAdapter(Context context, List<ItemObject> itemList) { 
     this.itemList = itemList; 
    }  
} 

MainActivity.java Code:

public class MainActivity extends AppCompatActivity { 

    private RecyclerView mRecyclerView; 
    private RecyclerView.Adapter mAdapter; 
    private RecyclerView.LayoutManager mLayoutManager; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view); 

     // use this setting to improve performance if you know that changes 
     // in content do not change the layout size of the RecyclerView 
     mRecyclerView.setHasFixedSize(true); 

     // use a GridLayout manager 
     mLayoutManager = new GridLayoutManager(this, 2); 
     mRecyclerView.setLayoutManager(mLayoutManager); 

     // specify an adapter 
     List<ItemObject> rowListItem = getAllItemList(); 
     mAdapter = new CardViewDataAdapter(MainActivity.this, rowListItem); 
     mRecyclerView.setAdapter(mAdapter); 

    } 

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

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      Toast.makeText(getApplicationContext(), "Settings Clicked", 
        Toast.LENGTH_SHORT).show(); 
      return true; 
     /* } else if (id == R.id.action_search) { 
      Toast.makeText(getApplicationContext(), "Search Clicked", 
        Toast.LENGTH_SHORT).show(); 
      return true;*/ 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    //Handles the references to items displayed on each cards 
    private List<ItemObject> getAllItemList() { 

     List<ItemObject> allItems = new ArrayList<ItemObject>(); 
     allItems.add(new ItemObject("Fire", R.drawable.fire)); 
     allItems.add(new ItemObject("Ambulance", R.drawable.ambulance)); 
     allItems.add(new ItemObject("Police", R.drawable.police)); 
     allItems.add(new ItemObject("AntiSquad", R.drawable.police)); 
     return allItems; 
    } 
} 

itemsObject.java Code:

public class ItemObject { 

    private String name; 
    private int photo; 

    public ItemObject(String name, int photo) { 
     this.name = name; 
     this.photo = photo; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public int getPhoto() { 
     return photo; 
    } 

    public void setPhoto(int photo) { 
     this.photo = photo; 
    } 
} 

cardview_row.xml Code:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:cardview="http://schemas.android.com/tools" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical"> 


    <!-- CardView with customized attributes --> 
    <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="170dp" 
     android:layout_gravity="center_horizontal" 
     android:layout_margin="10dp" 
     cardview:cardCornerRadius="20dp" 
     cardview:cardElevation="90dp" 
     android:elevation="2dp" 
     android:background="@drawable/myrect" 
     > 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" 
      android:padding="8dp"> 

      <ImageView 
       android:id="@+id/image_view" 
       android:layout_width="fill_parent" 
       android:layout_height="120dp" 
       /> 

      <TextView 
       android:id="@+id/image_name" 
       android:layout_width="match_parent" 
       android:layout_height="60dp" 
       android:background="#4757b3" 
       android:textColor="@android:color/white" 
       android:fontFamily="sans-serif-condensed" 
       android:textSize="20sp" 
       android:textAlignment="center" /> 
     </LinearLayout> 

    </android.support.v7.widget.CardView> 

</LinearLayout> 

Answer 1

verloren

Sieht aus wie Sie ein Context Problem.

Um den Kontext erhalten Sie müssen Ihren Code wie folgt ändern:

Intent callIntent = new Intent(Intent.ACTION_DIAL); 
callIntent.setData(Uri.parse("tel:123456789")); 
view.getContext().startActivity(callIntent); 

Answer 2

Try this:

btnTelephone.setOnClickListener(new View.OnClickListener() { 
           @Override 
           public void onClick(View v) { 
            //Call 1st phone number api 
            Uri callIntentUri = Uri.parse("tel:"+telephoneStringForCall); 
            Intent callIntent = new Intent(Intent.ACTION_DIAL, callIntentUri); 
            startActivity(callIntent); 
           } 
          }); 

und Ihre Ansichten Initialisierung überprüfen mb Sie etwas