- Forum posts: 1
Sep 28, 2016, 1:43:23 PM via Website
Sep 28, 2016 1:43:23 PM via Website
Hello, comrades. I am new in android development.
I need to creade listView with editText fields. I have read some articles, and I've done. But when i clicke in editText field, logcat shows me error: E/Surface: getSlotFromBufferLocked: unknown buffer: 0xb4013880. I searched in google, but without results. I apologise for radundant code.
This is manifest.
<manifest xmlns:android="schemas.android.com/apk/res/android"
package="com.example.vmitrofanov.bluetooth_proj">
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission-sdk-23 android:name="android.permission.BLUETOOTH"/>
<uses-permission-sdk-23 android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission-sdk-23 android:name="android.permission.BLUETOOTH_PRIVILEGED"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity" android:windowSoftInputMode="adjustPan">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
This is item layout
<?xml version="1.0" encoding="utf-8"?>
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="text"
android:text="@string/dev_name"
android:ems="10"
android:id="@+id/editText"
android:layout_weight="0.41"
tools:ignore="LabelFor" />
<ImageButton
android:layout_width="wrap_content"
app:srcCompat="@drawable/cog_wheel"
android:id="@+id/imageButton"
android:layout_height="wrap_content"
android:contentDescription="@string/button_desc"
android:onClick="onSettingButtonClicked"/>
Main layout
<?xml version="1.0" encoding="utf-8"?>
xmlns:tools="schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=" "
android:weightSum="0"
android:columnCount="3"
android:rowCount="2">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button 1"
android:id="@+id/button"
android:onClick="createBluetooth"
android:layout_column="0"
android:layout_row="1"
android:layout_gravity="left"
android:gravity="center" />
<Button
android:layout_width="172dp"
android:layout_height="wrap_content"
android:text="Button 2"
android:id="@+id/button2"
android:layout_gravity="center"
android:onClick="startDiscovery"
android:layout_column="1"
android:layout_row="1"
android:layout_columnSpan="1"
android:gravity="center" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button 3"
android:id="@+id/button3"
android:onClick="startDiscovery"
android:layout_column="2"
android:layout_row="1"
android:layout_columnSpan="1"
android:layout_gravity="right"
android:gravity="center" />
<ListView
android:id="@+id/listView"
android:layout_column="0"
android:layout_row="0"
android:layout_columnSpan="3"
android:choiceMode="singleChoice"
android:layout_marginLeft="0dp"
android:layout_rowWeight="1"
android:layout_width="match_parent"
android:layout_height="0dp" />
Adapter class
package com.example.vmitrofanov.bluetooth_proj;
import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import java.util.List;
public class DevSettingAdapter extends BaseAdapter
{
public DevSettingAdapter(Context context, List<String> elems)
{
m_context = context;
m_elems = elems;
m_inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public Object getItem(int i) {
return m_elems.get(i);
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
final ViewHolder holder;
if (view == null)
{
LayoutInflater inflater = (LayoutInflater) m_context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
holder = new ViewHolder();
view = inflater.inflate(R.layout.devsetting_reg, null);
holder.et_holder = (EditText) view.findViewById(R.id.editText);
holder.text = m_elems.get(i);
view.setTag(holder);
}
else
{
holder = (ViewHolder) view.getTag();
}
holder.et_holder.setText(m_elems.get(i));
holder.et_holder.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
m_elems.set(1, editable.toString());
}
});
return view;
}
@Override
public int getCount() {
return m_elems.size();
}
private class ViewHolder
{
EditText et_holder;
String text;
}
private List<String> m_elems;
private LayoutInflater m_inflater;
private Context m_context;
}
Main activity
package com.example.vmitrofanov.bluetooth_proj;
import android.app.Activity;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.accessibility.AccessibilityManagerCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.Manifest;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
public class MyBcReceiver extends BroadcastReceiver
{
MyBcReceiver()
{
super();
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action))
{
int checkPermission = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION);
Toast.makeText(context, "ACTION_DISCOVERY_STARTED" + String.valueOf(checkPermission), Toast.LENGTH_SHORT).show();
}
else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action))
{
Toast.makeText(context, "ACTION_DISCOVERY_FINISHED", Toast.LENGTH_SHORT).show();
}
else if (BluetoothDevice.ACTION_FOUND.equals(action))
{
Toast.makeText(context, "ACTION_FOUND", Toast.LENGTH_SHORT).show();
BluetoothDevice dev = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mPDev.add(dev.getName() + " " + dev.getAddress());
mListView = (ListView) findViewById(R.id.listView);
mListView.setAdapter(mPDev);
}
}
}
private static int REQUEST_BLUETOOTH = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
String[] permissions = new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.BLUETOOTH,
Manifest.permission.BLUETOOTH_ADMIN,
Manifest.permission.BLUETOOTH_PRIVILEGED};
ActivityCompat.requestPermissions(this, permissions, REQUEST_BLUETOOTH);
mReceiver = new MyBcReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
//IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
// int permissionCheck = ContextCompat.checkSelfPermission(R.layout.activity_main, "android.permission.ACCESS_COARSE_LOCATION");
List<String> lst = new ArrayList<>();
lst.add("item1");
lst.add("item2");
lst.add("item3");
lst.add("item4");
lst.add("item5");
DevSettingAdapter adapter = new DevSettingAdapter(this, lst);
mListView = (ListView) findViewById(R.id.listView);
mListView.setAdapter(adapter);
}
public void createBluetooth(View view)
{
mDevAdapter = BluetoothAdapter.getDefaultAdapter();
if (mDevAdapter == null)
{
Toast.makeText(this, "No supported bluetooth.", Toast.LENGTH_SHORT).show();
return;
}
// else
// {
// Toast.makeText(this, "Bluetooth device exist.", Toast.LENGTH_SHORT).show();
// }
if (!mDevAdapter.isEnabled())
{
Intent enIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enIntent, REQUEST_ENABLE_BT);
}
// else
// {
// Toast.makeText(this, "Bluetooth already enabled", Toast.LENGTH_SHORT).show();
// }
Set<BluetoothDevice> pairedDevices = mDevAdapter.getBondedDevices();
if (pairedDevices.size() > 0)
{
mPDev.clear();
for (BluetoothDevice dev : pairedDevices)
{
mPDev.add(dev.getName() + " " + dev.getAddress());
}
}
// if (mDevAdapter.isDiscovering())
// {
// mDevAdapter.cancelDiscovery();
// }
// if (mDevAdapter.startDiscovery())
// {
// TextView mView1 = (TextView) findViewById(R.id.textView);
// mView1.setText("Search starts OK.");
// }
}
public void startDiscovery(View view)
{
mPDev.clear();
mDevAdapter = BluetoothAdapter.getDefaultAdapter();
if (mDevAdapter.isDiscovering())
{
mDevAdapter.cancelDiscovery();
}
mDevAdapter.startDiscovery();
}
@Override
protected void onDestroy() {
super.onDestroy();
mDevAdapter.cancelDiscovery();
unregisterReceiver(mReceiver);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == REQUEST_ENABLE_BT && requestCode == RESULT_OK)
{
Toast.makeText(this, "Bluetooth enabled by user.", Toast.LENGTH_SHORT).show();
}
}
// ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
// public void onSettingButtonClicked(View view)
// {
// Context l_con = view.getContext();
// int curId = mListView.getId();
// Toast.makeText(l_con, "button: " + curId , Toast.LENGTH_SHORT).show();
// }
BroadcastReceiver mReceiver;
private BluetoothAdapter mDevAdapter = null;
private int REQUEST_ENABLE_BT = 1;
private ListView mListView = null;
private ArrayAdapter<String> mPDev;
}
— modified on Sep 28, 2016, 3:20:59 PM