我正在开发一个Android应用程序，我有一个问题，我希望你能帮我解决它。
所以我有一个名为MainActivity的activity1和名为myown的activity2。在myown我有一个公共课，我想在onItemClick() MainActivity中打电话。以下是这两项活动的代码：
MainActivity.java
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Set;
import java.util.UUID;
public class MainActivity extends ActionBarActivity {
class Active extends myown {
}
private BluetoothAdapter btadapter;
private Set<BluetoothDevice> pairedDevices;
private SeekBar redcontrol = null;
private SeekBar greencontrol = null;
private SeekBar bluecontrol = null;
private TextView redv;
private TextView greenv;
private TextView bluev;
private ListView lv;
LinearLayout linearLayout;
Button on, off, button;
private static final UUID MY_UUID =
UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// Insert bluetooth devices MAC address
private static String address = "00:14:02:13:08:21";
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_CANCELED) {
finish();
System.exit(10);
}
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btadapter = (BluetoothAdapter.getDefaultAdapter());
button = (Button)findViewById(R.id.button);
lv = (ListView)findViewById(R.id.listView1);
btadapter = BluetoothAdapter.getDefaultAdapter();
button = (Button) findViewById(R.id.button);
redv = (TextView) findViewById(R.id.redv);
greenv = (TextView) findViewById(R.id.greenv);
bluev = (TextView) findViewById(R.id.bluev);
redcontrol = (SeekBar) findViewById(R.id.seekBar);
greencontrol = (SeekBar) findViewById(R.id.seekBar2);
bluecontrol = (SeekBar) findViewById(R.id.seekBar3);
redcontrol.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int progressChanged = 0;
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progressChanged = progress;
redv.setText(String.valueOf(progress));
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
//Toast.makeText(MainActivity.this, "seek bar progress:" + progressChanged,
// Toast.LENGTH_SHORT).show();
}
});
greencontrol.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int progressChanged = 0;
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progressChanged = progress;
greenv.setText(String.valueOf(progress));
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
// Toast.makeText(MainActivity.this, "seek bar progress:" + progressChanged,
//Toast.LENGTH_SHORT).show();
}
});
bluecontrol.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int progressChanged = 0;
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progressChanged = progress;
bluev.setText(String.valueOf(progress));
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
//Toast.makeText(MainActivity.this, "seek bar progress:" + progressChanged,
// Toast.LENGTH_SHORT).show();
}
});
linearLayout = (LinearLayout) findViewById(R.id.linearLayout);
on = (Button) findViewById(R.id.on);
off = (Button) findViewById(R.id.off);
on.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
on.setBackgroundColor(Color.parseColor("#57D3E8"));
off.setBackgroundColor(Color.parseColor("#EAEAEA"));
if (!btadapter.isEnabled()) {
Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(turnOn, 0);
Toast.makeText(getApplicationContext(), "Bluetooth Turning On"
, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Already On",
Toast.LENGTH_SHORT).show();
}
}
});
off.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
off.setBackgroundColor(Color.parseColor("#57D3E8"));
on.setBackgroundColor(Color.parseColor("#EAEAEA"));
if (btadapter.isEnabled()) {
btadapter.disable();
Toast.makeText(getApplicationContext(), "Bluetooth Off"
, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Already Off",
Toast.LENGTH_SHORT).show();
}
}
});
}
public void list(View view) {
pairedDevices = btadapter.getBondedDevices();
ArrayList list = new ArrayList();
for(BluetoothDevice bt : pairedDevices)
list.add(bt.getName() +"\n" + bt.getAddress() );
Toast.makeText(getApplicationContext(),"Showing Paired Devices",
Toast.LENGTH_SHORT).show();
final ArrayAdapter adapter = new ArrayAdapter
(this,android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String item = ((TextView) view).getText().toString();
Toast.makeText(getBaseContext(), item, Toast.LENGTH_SHORT).show();
for (BluetoothDevice device : pairedDevices) {
if ("bluetooth".equals(device.getName())) {
Intent launchActivity2 = new Intent(MainActivity.this, myown.class);
MainActivity.this.startActivity(launchActivity2);
break;
}
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(true)) {
Toast.makeText(getBaseContext(), "Connected",Toast.LENGTH_SHORT).show();
//do nothing
}else {
Toast.makeText(getBaseContext(), "Unable to connect Light",Toast.LENGTH_SHORT).show();
}
view.setEnabled(false);
}
}
});
}
@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;
}
}
myown.java
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import java.io.IOException;
import java.util.UUID;
public class myown {
public class myOwnBroadcastReceiver extends BroadcastReceiver {
ConnectToBluetooth connectBT;
public BluetoothSocket scSocket;
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
BluetoothDevice discoveredDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
connectBT = new ConnectToBluetooth(discoveredDevice);
new Thread(connectBT).start();
}
class ConnectToBluetooth implements Runnable {
private BluetoothDevice btShield;
private BluetoothSocket mySocket = null;
private UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
public ConnectToBluetooth(BluetoothDevice bluetoothShield) {
btShield = bluetoothShield;
try {
mySocket = btShield.createRfcommSocketToServiceRecord(uuid);
} catch (IOException createSocketException) {
}
}
@Override
public void run() {
try {
mySocket.connect();
scSocket = mySocket;
} catch (IOException connectException) {
try {
mySocket.close(); //try to close the socket
} catch (IOException closeException) {
}
return;
}
}
// Will allow you to get the socket from this class
public BluetoothSocket getSocket() {
return mySocket;
}
/* Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mySocket.close();
} catch (IOException e) {
}
}
}
}
}
答案 0 :(得分：0)
将此添加到您的活动中
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
//add this
Intent launchActivity2 = new Intent(MainActivity.this, myown.class);
MainActivity.this.startActivity(launchActivity2);
//
String item = ((TextView) view).getText().toString();
Toast.makeText(getBaseContext(), item, Toast.LENGTH_SHORT).show();
for (BluetoothDevice device : pairedDevices) {
if ("bluetooth".equals(device.getName())) {
Intent launchActivity2 = new Intent(MainActivity.this, myown.class);
MainActivity.this.startActivity(launchActivity2);
break;
}
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(true)) {
Toast.makeText(getBaseContext(), "Connected",Toast.LENGTH_SHORT).show();
//do nothing
}else {
Toast.makeText(getBaseContext(), "Unable to connect Light",Toast.LENGTH_SHORT).show();
}
view.setEnabled(false);
}
}
});