在MainActivity课程中：
public class MainActivity extends ActionBarActivity {
public static final int MESSAGE_STATE_CHANGE = 1;
public static final int MESSAGE_READ = 2;
public static final int MESSAGE_WRITE = 3;
public static final int MESSAGE_DEVICE_NAME = 4;
public static final int MESSAGE_TOAST = 5;
public static final String DEVICE_NAME = "device_name";
public static final String TOAST = "toast";
private static final int REQUEST_CONNECT_DEVICE_SECURE = 1;
private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2;
private static final int REQUEST_ENABLE_BT = 3;
private ListView lvMainChat;
private EditText etMain;
private Button btnSend;
private String connectedDeviceName = null;
private List<Message1> listMessages;
private MessagesListAdapter chatArrayAdapter;
private StringBuffer outStringBuffer;
private BluetoothAdapter bluetoothAdapter = null;
private ChatService chatService = null;
private EditText result;
final Context context = this;
private Handler handler = new Handler(new Callback() {
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case ChatService.STATE_CONNECTED:
setStatus(getString(R.string.title_connected_to,
connectedDeviceName));
chatArrayAdapter.isEmpty();
break;
case ChatService.STATE_CONNECTING:
setStatus(R.string.title_connecting);
break;
case ChatService.STATE_LISTEN:
case ChatService.STATE_NONE:
setStatus(R.string.title_not_connected);
break;
}
break;
case MESSAGE_WRITE:
byte[] writeBuf = (byte[]) msg.obj;
String writemessage = new String(writeBuf);
boolean isSelf1 = true;
Message1 m1 = new Message1(writemessage, isSelf1);
// Appending the message to chat list
appendMessage(m1);
break;
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
String readMessage = new String(readBuf, 0, msg.arg1);
boolean isSelf = false;
Message1 m = new Message1(readMessage, isSelf);
// Appending the message to chat list
appendMessage(m);
break;
case MESSAGE_DEVICE_NAME:
connectedDeviceName = msg.getData().getString(DEVICE_NAME);
Toast.makeText(getApplicationContext(),
"Connected to " + connectedDeviceName,
Toast.LENGTH_SHORT).show();
break;
case MESSAGE_TOAST:
Toast.makeText(getApplicationContext(),
msg.getData().getString(TOAST), Toast.LENGTH_SHORT)
.show();
break;
}
return false;
}
});
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
getWidgetReferences();
bindEventHandler();
Button Enskripsi = (Button) this.findViewById(R.id.btnEnskripsi);
if (bluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth is not available",
Toast.LENGTH_LONG).show();
finish();
return;
}
result = (EditText) findViewById(R.id.etMain);
Enskripsi.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// get prompts.xml view
LayoutInflater li = LayoutInflater.from(context);
View promptsView = li.inflate(R.layout.enskripsi, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set prompts.xml to alertdialog builder
alertDialogBuilder.setView(promptsView);
final EditText ciperteks = (EditText) promptsView
.findViewById(R.id.cipertext);
final EditText plainteks = (EditText) promptsView
.findViewById(R.id.plaintext);
final EditText key1 = (EditText) promptsView
.findViewById(R.id.key1);
final Button enskripsi = (Button) promptsView
.findViewById(R.id.btEnskripsi1);
// set dialog message
alertDialogBuilder
.setTitle("Enskripsi Pesan")
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
// get user input and set it to result
// edit text
String plaintext = plainteks.getText().toString().trim();
String key=key1.getText().toString().trim();
String ciper=ciperteks.getText().toString().trim();
result.setText(ciperteks.getText());
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
enskripsi.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String plaintext = plainteks.getText().toString().trim();
String key=key1.getText().toString().trim();
String enKata = "";
if (plaintext.isEmpty()|| key.isEmpty()) {
Toast.makeText(getBaseContext(), "Silahkan Isi Textbox Yang Kosong", 1).show();
} else {
try {
enKata = CopyOfZIgZagCode1.RFEncryptionWork(key, plaintext);
} catch (Exception e) {}
ciperteks.setText(enKata);
}
}
});
}
});
}
private void getWidgetReferences() {
lvMainChat = (ListView) findViewById(R.id.lvMainChat);
etMain = (EditText) findViewById(R.id.etMain);
btnSend = (Button) findViewById(R.id.btnSend);
}
private void bindEventHandler() {
btnSend.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String message = etMain.getText().toString();
sendMessage(message);
}
});
}
private void appendMessage(final Message1 m) {
runOnUiThread(new Runnable() {
@Override
public void run() {
listMessages.add(m);
chatArrayAdapter.notifyDataSetChanged();
// Playing device's notification
playBeep();
}
});
}
public void playBeep() {
try {
Uri notification = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getApplicationContext(),
notification);
r.play();
} catch (Exception e) {
e.printStackTrace();
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CONNECT_DEVICE_SECURE:
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, true);
}
break;
case REQUEST_CONNECT_DEVICE_INSECURE:
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, false);
}
break;
case REQUEST_ENABLE_BT:
if (resultCode == Activity.RESULT_OK) {
setupChat();
} else {
Toast.makeText(this, R.string.bt_not_enabled_leaving,
Toast.LENGTH_SHORT).show();
finish();
}
}
}
private void connectDevice(Intent data, boolean secure) {
String address = data.getExtras().getString(
DeviceListActivity.DEVICE_ADDRESS);
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
chatService.connect(device, secure);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.option_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Intent serverIntent = null;
switch (item.getItemId()) {
case R.id.secure_connect_scan:
serverIntent = new Intent(this, DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_SECURE);
return true;
case R.id.insecure_connect_scan:
serverIntent = new Intent(this, DeviceListActivity.class);
startActivityForResult(serverIntent,
REQUEST_CONNECT_DEVICE_INSECURE);
return true;
case R.id.discoverable:
ensureDiscoverable();
return true;
}
return false;
}
private void ensureDiscoverable() {
if (bluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
Intent discoverableIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(
BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);
}
}
private void sendMessage(String message) {
if (message.length() > 0) {
byte[] send = message.getBytes();
chatService.write(send);
outStringBuffer.setLength(0);
etMain.setText(outStringBuffer);
}
}
private TextView.OnEditorActionListener mWriteListener = new TextView.OnEditorActionListener() {
public boolean onEditorAction(TextView view, int actionId,
KeyEvent event) {
if (actionId == EditorInfo.IME_NULL
&& event.getAction() == KeyEvent.ACTION_UP) {
String message = view.getText().toString();
sendMessage(message);
}
return true;
}
};
private final void setStatus(int resId) {
final ActionBar actionBar = getSupportActionBar();
actionBar.setSubtitle(resId);
}
private final void setStatus(CharSequence subTitle) {
final ActionBar actionBar = getSupportActionBar();
actionBar.setSubtitle(subTitle);
}
private void setupChat() {
listMessages = new ArrayList<Message1>();
chatArrayAdapter = new MessagesListAdapter(this, listMessages);
lvMainChat.setAdapter(chatArrayAdapter);
lvMainChat.setTextFilterEnabled(true);
lvMainChat.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),
((TextView) view).getText(), Toast.LENGTH_SHORT).show();
}
});
chatService = new ChatService(this, handler);
outStringBuffer = new StringBuffer("");
}
@Override
public void onStart() {
super.onStart();
if (!bluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
} else {
if (chatService == null)
setupChat();
}
}
@Override
public synchronized void onResume() {
super.onResume();
if (chatService != null) {
if (chatService.getState() == ChatService.STATE_NONE) {
chatService.start();
}
}
}
}
AdapterList中的源代码
public class MessagesListAdapter extends BaseAdapter {
private Context context;
private List<Message1> messagesItems = new ArrayList<Message1>();
public MessagesListAdapter(Context context, List<Message1> navDrawerItems) {
this.context = context;
this.messagesItems = navDrawerItems;
}
@Override
public int getCount() {
return messagesItems.size();
}
@Override
public Object getItem(int position) {
return messagesItems.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@SuppressLint("InflateParams")
@Override
public View getView(int position, View convertView, final ViewGroup parent) {
/**
* The following list not implemented reusable list items as list items
* are showing incorrect data Add the solution if you have one
* */
Message1 m = messagesItems.get(position);
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View rowView = mInflater.inflate(R.layout.main, parent, false);
// Identifying the message owner
if (m.isSelf()) {
// message belongs to you, so load the right aligned layout
convertView = mInflater.inflate(R.layout.list_item_message_right1,
null);
} else {
// message belongs to other person, load the left aligned layout
convertView = mInflater.inflate(R.layout.list_item_message_left1,
null);
}
TextView lblFrom = (TextView) convertView.findViewById(R.id.lblMsgFrom);
TextView txtMsg = (TextView) convertView.findViewById(R.id.txtMsg);
ListView lvMainChat = (ListView) convertView.findViewById(R.id.lvMainChat);
txtMsg.setText(m.getMessage());
return convertView;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:paddingLeft="10dp">
<TextView
android:id="@+id/lblMsgFrom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12dp"
android:textColor="@color/lblFromName"
android:textStyle="italic"
android:padding="5dp"/>
<TextView
android:id="@+id/txtMsg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16dp"
android:layout_marginRight="80dp"
android:textColor="@color/title_gray"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:background="@drawable/bg_msg_from"/>
</LinearLayout>
list_item_message_right1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right"
android:orientation="vertical"
android:paddingBottom="5dp"
android:paddingRight="10dp"
android:paddingTop="5dp" >
<TextView
android:id="@+id/lblMsgFrom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:textColor="@color/lblFromName"
android:textSize="12dp"
android:textStyle="italic" />
<TextView
android:id="@+id/txtMsg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:background="@drawable/bg_msg_you"
android:paddingBottom="5dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:textColor="@color/white"
android:textSize="16dp" />
</LinearLayout>
答案 0 :(得分：0)
我猜你在这里有错误：
{'oct': 10}
不要将列表项转换为Toast.makeText(getApplicationContext(), ((TextView) view).getText(), Toast.LENGTH_SHORT).show();，因为它们不是（在XML中将它们定义为(TextView)）。
从适配器获取所需的字符串或使用列表项视图的子视图。
尝试即
LinearLayout