使用对话框在列表视图项的文本视图和数据库中保存数据

Question

Here I m trying to save and store data in to SQLite database by poping up the dialog onLong click on the listview item (Each listview items contains textView and toggle button, similar 8 items generated by adapter).

Dialog contains edittext field, on entering the data and clicking on OK Button should create database and same should be the text of textview of that item of listview only.

• I m facing problem in changing the data of the textView of listview item and also in setting up database. Any suggestion will be of great help Thank you...

MainActivity.java

public class MainActivity extends ActionBarActivity implements
        ListAdapter.customButtonListener {
    String ipaddress, ipaddress1;
    SharedPreferences sharedpreferences;
    EditText ed1,ed2;
    private ListView listView;
    public static final String MY_PREFERENCES = "MyPreferences";
    SharedPreferences myPreferences;
    ListAdapter adapter;
    ArrayList<String> dataItems = new ArrayList<String>();
    ProgressDialog waitDialog;
    AlertDialog.Builder alert;
    String noteID;
    TextView child;
    NoteHelper helper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String[] dataArray = getResources().getStringArray(R.array.listdata);
        List<String> dataTemp = Arrays.asList(dataArray);
        dataItems.addAll(dataTemp);
        ed1 = (EditText) findViewById(R.id.editText);
        helper=new NoteHelper(this);
        child=(TextView)findViewById(R.id.childTextView);
        //alert = new AlertDialog.Builder(this);
        listView = (ListView) findViewById(R.id.listView);
        adapter = new ListAdapter(MainActivity.this, dataItems);
        adapter.setCustomButtonListner(MainActivity.this);
        listView.setAdapter(adapter);
        registerForContextMenu(listView);
        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(AdapterView<?> adapterView, View view, final int i, long l) {
            final Dialog dialog = new Dialog(MainActivity.this);
            WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
            lp.copyFrom(dialog.getWindow().getAttributes());
            lp.width = WindowManager.LayoutParams.MATCH_PARENT;
            lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
            dialog.show();
            dialog.getWindow().setAttributes(lp);
            dialog.setContentView(R.layout.prompts);
            dialog.setTitle("Update!!!");
            final EditText userinput=(EditText)dialog.findViewById(R.id.editTextDialogUserInput);

            Button Update = (Button) dialog.findViewById(R.id.dialogButtonOK);
            Button Cancel=(Button)dialog.findViewById(R.id.dialogButtonCANCEL);

            Update.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (userinput.getText() != null) {
                        String text=userinput.getText().toString();
                        //child.setText(userinput.getText().toString());
                        myPreferences = getSharedPreferences (MY_PREFERENCES, Context.MODE_PRIVATE);
                        SharedPreferences.Editor editor = myPreferences.edit ();
                        editor.putString(MY_PREFERENCES,text);
                        editor.commit ();

                        myPreferences = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);

                        String strUsername = myPreferences.getString(MY_PREFERENCES,text);
                        // child.setText(strUsername);
                        Toast.makeText(MainActivity.this, ""+userinput.getText()+"uploaded successfully", Toast.LENGTH_SHORT).show();
                    }

                }
            });

            Cancel.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    dialog.dismiss();
                }
            });
            dialog.show();
            return true;

        }
    });
}

ListAdapter.java

public class ListAdapter extends ArrayAdapter<String> {
    customButtonListener customListner;

    public interface customButtonListener {
        public void onButtonClickListner(int position,String value);
        public void onClickListner(int position, String temp);
    }

    public void setCustomButtonListner(customButtonListener listener) {
        this.customListner = listener;
    }

    private Context context;
    private ArrayList<String> data = new ArrayList<String>();

    public ListAdapter(Context context, ArrayList<String> dataItem) {
        super(context, R.layout.row, dataItem);
        this.data = dataItem;
        this.context = context;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
      final  ViewHolder viewHolder;
        if (convertView == null) {
            LayoutInflater inflater = LayoutInflater.from(context);
            convertView = inflater.inflate(R.layout.row, null);
            viewHolder = new ViewHolder();
            viewHolder.text = (TextView) convertView.findViewById(R.id.childTextView);
            viewHolder.button = (Button) convertView.findViewById(R.id.childButton);
            viewHolder.buttonoff = (Button) convertView.findViewById(R.id.childButton1);
            convertView.setTag(viewHolder);
        }
        else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        final String temp = getItem(position);
        viewHolder.text.setText(temp);
        viewHolder.button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (customListner != null) {
                    customListner.onButtonClickListner(position,temp);
                }
            }
        });
        viewHolder.buttonoff.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if (customListner != null) {
                    customListner.onClickListner(position, temp);
                }
            }
        });
        return convertView;
    }

    public class ViewHolder {
        TextView text;
        Button button;
        Button buttonoff;
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@+id/listView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@+id/editText"
        >
    </ListView>

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:hint="IP ADDRESS"
        android:textAlignment="center"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>

row.xml

<TextView
    android:id="@+id/childTextView"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:editable="true"
    android:layout_alignParentLeft="true"
    android:layout_toStartOf="@+id/childButton" />

<Button
    android:id="@+id/childButton"
    android:layout_width="55dp"
    android:layout_height="55dp"
    android:text="ON"
    android:layout_alignParentTop="true"
    android:layout_alignParentEnd="true"
    android:layout_marginEnd="61dp" />

<Button
    android:id="@+id/childButton1"
    android:layout_width="55dp"
    android:layout_height="55dp"
    android:text="OFF"
    android:layout_alignTop="@+id/childButton"
    android:layout_alignParentEnd="true" />

prompts.xml

<EditText
    android:id="@+id/editTextDialogUserInput"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:editable="true"
    android:layout_alignParentStart="true">
    <requestFocus/>
</EditText>
<Button
    android:id="@+id/dialogButtonOK"
    android:layout_width="105dp"
    android:layout_height="60dp"
    android:text="UPDATE"
    android:layout_marginRight="5dp"
    android:layout_marginStart="56dp"
    android:layout_below="@+id/editTextDialogUserInput"
    android:layout_alignParentStart="true" />

<Button
    android:id="@+id/dialogButtonCANCEL"
    android:layout_width="105dp"
    android:layout_height="60dp"
    android:text=" CANCEL "
    android:layout_marginRight="5dp"
    android:layout_below="@+id/editTextDialogUserInput"
    android:layout_toEndOf="@+id/dialogButtonOK" />

MainActivity.java

below is the code of onClickListener of the button in item of listView

@Override
public void onClickListner(int position, String temp,View view) {
    int position1 = Integer.parseInt(view.getTag().toString());

    final Dialog dialog1 = new Dialog(MainActivity.this);
    WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
    lp.copyFrom(dialog1.getWindow().getAttributes());
    lp.width = WindowManager.LayoutParams.MATCH_PARENT;
    lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
    dialog1.show();
    dialog1.getWindow().setAttributes(lp);
    dialog1.setContentView(R.layout.prompts);
    dialog1.setTitle("Update!!!");
    final EditText userinput=(EditText)dialog1.findViewById(R.id.editTextDialogUserInput);

    Button Update = (Button) dialog1.findViewById(R.id.dialogButtonOK);
    Button Cancel=(Button)dialog1.findViewById(R.id.dialogButtonCANCEL);

    Update.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            //int position = Integer.parseInt(v.getTag().toString());
            String text=userinput.getText().toString();
            if(text!=null) {
                // If you want to find the textView sibling of the button you clicked and change its text
                //Null pointer exception occured
                ((TextView) ((View) v.getParent()).findViewById(R.id.childTextView)).setText(text);
            }
        }
    });
}

Answer 1

Setup the onClick method in your activity and hook it in the xml. Something like this

<Button
     android:id="@+id/childButton1"
     android:layout_width="55dp"
     android:layout_height="55dp"
     android:text="OFF"
     android:onclick="onChildButton1"
     android:layout_alignTop="@+id/childButton"
     android:layout_alignParentEnd="true" />

Set a tag to this button in the listView adapter implementation

    holder.childButton1.setTag(position);

You can setup any information related to this row as a tag that you might require to perform the action on click.

Implement the method in your activity which has the listView

 public void onChildButton1(View view) {
       // Do your Dialog action here
       // If you want to figure out the position of the item of button just do this
      int position = Integer.parseInt(view.getTag().toString())

      // If you want to find the textView sibling of the button you clicked and change its text
      ((TextView)((View) view.getParent()).findViewById(R.id.text_view_id)).setText("Your string");

 }

EDIT

You need to get the TextView of the list item not the dialog prompt

The function should look like this.

public void onChildButton1 (final View childButton1) {
final Dialog dialog1 = new Dialog(MainActivity.this);
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.copyFrom(dialog1.getWindow().getAttributes());
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
dialog1.show();
dialog1.getWindow().setAttributes(lp);
dialog1.setContentView(R.layout.prompts);
dialog1.setTitle("Update!!!");
final EditText userinput=(EditText)dialog1.findViewById(R.id.editTextDialogUserInput);

Button Update = (Button) dialog1.findViewById(R.id.dialogButtonOK);
Button Cancel=(Button)dialog1.findViewById(R.id.dialogButtonCANCEL);

Update.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {

            //int position = Integer.parseInt(v.getTag().toString());
            String text=userinput.getText().toString();
        if(text!=null) {
            // If you want to find the textView sibling of the button you clicked and change its text

            //Null pointer exception resolved
            ((TextView) ((View) childButton1.getParent()).findViewById(R.id.childTextView)).setText(text);


        }
    }
});
}