如果按下按钮，我有一个ListView搜索蓝牙设备。 这很好。 它在一行中显示名称，在另一行中显示地址。 现在我想将地址保存在字符串中。 但是我怎样才能从ListView中读取这个地址呢？ 希望你能理解我的问题。 对不起我的英语我不是一个天真的演讲者=）
这是我的代码：
import android.app.Activity;
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.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class Suchen extends Activity {
private static final int REQUEST_ENABLE_BT = 1;
Bluetooth connection;
ListView listDevicesFound;
Button btnScanDevice;
TextView stateBluetooth;
BluetoothAdapter bluetoothAdapter;
ArrayAdapter<String> btArrayAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_suchen);
btnScanDevice = (Button)findViewById(R.id.scandevice);
stateBluetooth = (TextView)findViewById(R.id.bluetoothstate);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
listDevicesFound = (ListView)findViewById(R.id.devicesfound);
btArrayAdapter = new ArrayAdapter<String>(Suchen.this, android.R.layout.simple_list_item_1);
listDevicesFound.setAdapter(btArrayAdapter);
CheckBlueToothState();
btnScanDevice.setOnClickListener(btnScanDeviceOnClickListener);
registerReceiver(ActionFoundReceiver,
new IntentFilter(BluetoothDevice.ACTION_FOUND));
listDevicesFound.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
unregisterReceiver(ActionFoundReceiver);
}
private void CheckBlueToothState(){
if (bluetoothAdapter == null){
stateBluetooth.setText("Bluetooth wird NICHT unterstützt");
}else{
if (bluetoothAdapter.isEnabled()){
if(bluetoothAdapter.isDiscovering()){
stateBluetooth.setText("Geräte werden gesucht.");
}else{
stateBluetooth.setText("Bluetooth ist eingeschaltet.");
btnScanDevice.setEnabled(true);
}
}else{
stateBluetooth.setText("Bluetooth is NICHT eingeschaltet!");
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
}
private Button.OnClickListener btnScanDeviceOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
btArrayAdapter.clear();
bluetoothAdapter.startDiscovery();
}};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == REQUEST_ENABLE_BT){
CheckBlueToothState();
}
}
//String definieren, der die MAC-Adresse speichert
public static String a;
private final BroadcastReceiver ActionFoundReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
btArrayAdapter.add(device.getName() + "\n" + device.getAddress());
btArrayAdapter.notifyDataSetChanged();
a = device.getAddress();
}
}
};
public void verbinden_01 (View view) {
Intent intent = new Intent(this, Bluetooth.class);
System.out.println(a);
intent.putExtra("ADRESSE", a);
startActivity(intent);
}
}
目前我想将地址保存在字符串a。
中愿它有所帮助。所以这是我的logcat
05-16 16:54:37.261: W/ActivityThread(24898): Application com.example.obdii is waiting for the debugger on port 8100...
05-16 16:54:37.266: I/System.out(24898): Sending WAIT chunk
05-16 16:54:37.356: I/dalvikvm(24898): Debugger is active
05-16 16:54:37.466: I/System.out(24898): Debugger has connected
05-16 16:54:37.466: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:37.666: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:37.866: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:38.071: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:38.271: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:38.471: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:38.671: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:38.871: I/System.out(24898): waiting for debugger to settle...
05-16 16:54:39.071: I/System.out(24898): debugger has settled (1409)
05-16 16:54:39.251: D/dalvikvm(24898): GC_FOR_ALLOC freed 54K, 11% free 7139K/7939K, paused 15ms, total 15ms
05-16 16:54:39.256: I/dalvikvm-heap(24898): Grow heap (frag case) to 8.596MB for 1046688-byte allocation
05-16 16:54:39.276: D/dalvikvm(24898): GC_CONCURRENT freed 1K, 10% free 8160K/8967K, paused 12ms+1ms, total 23ms
05-16 16:54:39.381: D/libEGL(24898): loaded /system/lib/egl/libEGL_mali.so
05-16 16:54:39.381: D/libEGL(24898): loaded /system/lib/egl/libGLESv1_CM_mali.so
05-16 16:54:39.386: D/libEGL(24898): loaded /system/lib/egl/libGLESv2_mali.so
05-16 16:54:39.386: D/(24898): Device driver API match
05-16 16:54:39.386: D/(24898): Device driver API version: 10
05-16 16:54:39.386: D/(24898): User space API version: 10
05-16 16:54:39.386: D/(24898): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Tue Oct 16 15:37:13 KST 2012
05-16 16:54:39.421: D/OpenGLRenderer(24898): Enabling debug mode 0
05-16 16:54:41.341: D/AbsListView(24898): Get MotionRecognitionManager
05-16 16:54:41.731: E/SpannableStringBuilder(24898): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
05-16 16:54:41.731: E/SpannableStringBuilder(24898): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
05-16 16:54:50.156: E/SpannableStringBuilder(24898): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
05-16 16:54:50.161: E/SpannableStringBuilder(24898): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
05-16 16:54:58.786: D/AndroidRuntime(24898): Shutting down VM
05-16 16:54:58.786: W/dalvikvm(24898): threadid=1: thread exiting with uncaught exception (group=0x41e5a2a0)
05-16 16:54:58.841: E/AndroidRuntime(24898): java.lang.IllegalStateException: Could not execute method of the activity
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.view.View$1.onClick(View.java:3704)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.view.View.performClick(View.java:4232)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.view.View$PerformClick.run(View.java:17318)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.os.Handler.handleCallback(Handler.java:615)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.os.Handler.dispatchMessage(Handler.java:92)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.os.Looper.loop(Looper.java:137)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.app.ActivityThread.main(ActivityThread.java:4921)
05-16 16:54:58.841: E/AndroidRuntime(24898): at java.lang.reflect.Method.invokeNative(Native Method)
05-16 16:54:58.841: E/AndroidRuntime(24898): at java.lang.reflect.Method.invoke(Method.java:511)
05-16 16:54:58.841: E/AndroidRuntime(24898): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
05-16 16:54:58.841: E/AndroidRuntime(24898): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
05-16 16:54:58.841: E/AndroidRuntime(24898): at dalvik.system.NativeStart.main(Native Method)
05-16 16:54:58.841: E/AndroidRuntime(24898): Caused by: java.lang.reflect.InvocationTargetException
05-16 16:54:58.841: E/AndroidRuntime(24898): at java.lang.reflect.Method.invokeNative(Native Method)
05-16 16:54:58.841: E/AndroidRuntime(24898): at java.lang.reflect.Method.invoke(Method.java:511)
05-16 16:54:58.841: E/AndroidRuntime(24898): at android.view.View$1.onClick(View.java:3699)
05-16 16:54:58.841: E/AndroidRuntime(24898): ... 11 more
05-16 16:54:58.841: E/AndroidRuntime(24898): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=1; index=1
05-16 16:54:58.841: E/AndroidRuntime(24898): at com.example.obdii.Suchen.verbinden_01(Suchen.java:133)
05-16 16:54:58.841: E/AndroidRuntime(24898): ... 14 more
答案 0 :(得分：1)
到目前为止，正如我所看到的，您可以在以下行将文本推送到适配器：
btArrayAdapter.add(device.getName() + "\n" + device.getAddress());
因此，您的ListItem内部只有一个TextView，文字为device.getName() + "\n" + device.getAddress()
稍后，您通过以下调用检索它，以便在Toast显示onItemClickListener：
((TextView) view).getText()
如果您知道，该分隔符只是\n，您可以拆分指定此分隔符的行：
String myText = ((TextView) view).getText();
String address = myText.split("\n")[1];
a是一个类成员，所以它在任何内部类中都可见。