搜索藍牙設備和使用android編程顯示

Question

嘿，大家這可能是一個愚蠢的問題，但我有點困惑。所以我需要一個幫助，我是新來的android。這裏是我的代碼，我有我試圖 Main.java

package com.example.bluetooth; 

    import java.util.Set; 
    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.Menu; 
    import android.view.View; 
    import android.view.View.OnClickListener; 
    import android.widget.ArrayAdapter; 
    import android.widget.Button; 
    import android.widget.ListView; 
    import android.widget.TextView; 
    import android.widget.Toast; 

    public class MainActivity extends Activity { 
private static final int REQUEST_ENABLE_BT = 1; 
private Button onBtn; 
private Button offBtn; 
private Button listBtn; 
private Button findBtn; 
private TextView text; 
private BluetoothAdapter myBluetoothAdapter; 
private Set<BluetoothDevice> pairedDevices; 
private ListView myListView; 
private ArrayAdapter<String> BTArrayAdapter; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    text = (TextView) findViewById(R.id.text); 
    onBtn = (Button) findViewById(R.id.turnOn); 
    offBtn = (Button) findViewById(R.id.turnOff); 
    listBtn = (Button) findViewById(R.id.paired); 
    findBtn = (Button) findViewById(R.id.search); 
    myListView = (ListView) findViewById(R.id.list1); 
    BTArrayAdapter = new ArrayAdapter<String>(this,R.layout.simple_list_item_1); 
    myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 
    if(myBluetoothAdapter == null){ 

     onBtn.setEnabled(false); 
     offBtn.setEnabled(false); 
     listBtn.setEnabled(false); 
     findBtn.setEnabled(false); 
     text.setText("Status: not supported"); 
     Toast.makeText(getApplicationContext(), "Bluetooth is not supported on your device.", Toast.LENGTH_SHORT).show(); 
    }else{ 
     text = (TextView) findViewById(R.id.text); 
     onBtn = (Button) findViewById(R.id.turnOn); 
     onBtn.setOnClickListener(new OnClickListener(){ 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       on(v); 
      } 
     }); 
     offBtn = (Button) findViewById(R.id.turnOff); 
     offBtn.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       off(v); 
      } 
     }); 
     listBtn = (Button) findViewById(R.id.paired); 
     listBtn.setOnClickListener(new OnClickListener(){ 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       list(v); 
      } 

     }); 
     findBtn = (Button) findViewById(R.id.search); 
     findBtn.setOnClickListener(new OnClickListener(){ 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       find(v); 
      } 

     }); 
     myListView = (ListView) findViewById(R.id.list1); 
     BTArrayAdapter = new ArrayAdapter<String>(this,R.layout.activity_main); 
    } 
} 

public void on(View view) { 

    if (!myBluetoothAdapter.isEnabled()) { 

     Intent turnOnIntent = new Intent(
       BluetoothAdapter.ACTION_REQUEST_ENABLE); 

     startActivityForResult(turnOnIntent, REQUEST_ENABLE_BT); 

     Toast.makeText(getApplicationContext(), "Bluetooth turned on", 
       Toast.LENGTH_LONG).show(); 
    } else { 
     Toast.makeText(getApplicationContext(), "Bluetooth is already on", 

     Toast.LENGTH_LONG).show(); 
    } 
} 
public void onActivityResult(int requestCode,int resultCode, Intent data){ 
    if(requestCode == REQUEST_ENABLE_BT){ 
     if(myBluetoothAdapter.isEnabled()){ 
      text.setText("Status : Connected"); 
     }else{ 
      text.setText("Status : Disconnected"); 
     } 
    } 
} 
public void list(View view){ 
    pairedDevices = myBluetoothAdapter.getBondedDevices(); 
    for(BluetoothDevice device : pairedDevices) 
    BTArrayAdapter.add(device.getName()+ "\n" + device.getAddress()); 
    Toast.makeText(getApplicationContext(),"Show Paired Devices", 
    Toast.LENGTH_SHORT).show(); 
} 

final BroadcastReceiver bReceiver = new BroadcastReceiver() { 
    public void onReceive(Context context, Intent intent) { 
    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(); 
    } 
    } 
}; 


public void find(View view) { 
if (myBluetoothAdapter.isDiscovering()) { 
    myBluetoothAdapter.cancelDiscovery(); 
}else { 
    BTArrayAdapter.clear(); 
    myBluetoothAdapter.startDiscovery(); 
    registerReceiver(bReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND)); 
    } 
} 


public void off(View v) { 
    // TODO Auto-generated method stub 
    myBluetoothAdapter.disable(); 
    text.setText("Bluetooth is disconnected"); 
    Toast.makeText(getApplicationContext(), "Bluetooth is disconnected", Toast.LENGTH_LONG).show(); 
} 
    @Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

} 

我正在與simple_list_item_1管理錯誤。我不知道要解決這個問題，所以請幫助我解決這個問題。 這是我的XML代碼提前

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context=".MainActivity" > 

<TextView 

    android:id="@+id/text" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/Status" 
    android:textAppearance="?android:attr/textAppearanceLarge"/> 
<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:layout_marginTop="30dp" > 
    <Button 
     android:id="@+id/turnOn" 
     android:text="@string/on" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 
    <Button 
     android:id="@+id/turnOff" 
     android:text="@string/off" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 

</LinearLayout> 

<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:layout_marginTop="80dp" > 
    <Button 
     android:id="@+id/paired" 
     android:text="@string/paired" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 
    <Button 
     android:id="@+id/search" 
     android:text="@string/search" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 
    <ListView 
     android:id="@+id/list1" 
     android:layout_height="200dp" 
     android:layout_width="fill_parent"> 

    </ListView> 
</LinearLayout> 

</RelativeLayout> 

感謝。

Answer 1

自認爲是一個Android resource，你不創造之一，android前綴追加到它像這樣

BTArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1);