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我試圖通過點擊不同的CardViews從我的應用程序撥號，但它不適用於我。Android如何使用CardView調用電話號碼OnClick方法
每次我嘗試添加一個intent時，startActivity都會變成紅色並彈出錯誤消息「無法解析方法」。 我甚至在startActivity（）之前嘗試添加上下文，但它使應用程序崩潰。
我爲了發起呼叫，並 我有3個Java類被點擊4個CardViews：CardViewDataAdapter其中recyclerView持有人宣佈，MainActivity和itemObject 在activity_main我使用recycler_view。在cardview_row中，我使用了card_view並將其與回收站視圖綁定。
請好心幫助我，我已經使用了這個問題，並且在堆棧溢出中查找它，但沒有找到解決方案。
CardViewDataAdapter.java代碼：
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代碼：
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代碼：
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代碼：
<?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>
什麼是錯的錯誤或堆棧跟蹤？ –
將崩潰的整個堆棧跟蹤作爲編輯添加到您的問題中，它會爲您提供更好的答覆。 –
@ShadabK無法在OnClick View方法的if-else部分解析方法'startActivity（android.content.intent）' –