相关疑难解决方法(0)

我想在两个纬度经度之间绘制路径.这是我的MapsActivity.java.

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment)
getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);

        find = (Button) findViewById(R.id.btnFindPath);
        or = (EditText) findViewById(R.id.etOrigin);
        dest = (EditText) findViewById(R.id.etDestination);


        find.setOnClickListener(new View.OnClickListener() {
            @Override

            public void onClick(View view) {

            sendRequest();

            }
        });
    }

    public void sendRequest(){

        String origin = or.getText().toString();
        String destination = dest.getText().toString();

        if(origin.isEmpty()){
            Toast.makeText(this,"Please Enter the Origin" , Toast.LENGTH_SHORT).show();
        }

        if(destination.isEmpty()){
            Toast.makeText(this,"Please Enter the Destination" , …

我是 nubie 编程 android 并且我知道在这里有很多页面讨论我的问题的解决方案，但现在我失去了 2 天仍然没有得到解决方案。请帮我！

首先是我的错误：

01-02 11:08:27.314: D/AndroidRuntime(1045): Shutting down VM
01-02 11:08:27.314: W/dalvikvm(1045): threadid=1: thread exiting with uncaught exception (group=0x409e61f8)
01-02 11:08:27.324: E/AndroidRuntime(1045): FATAL EXCEPTION: main
01-02 11:08:27.324: E/AndroidRuntime(1045): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.wifiscan/com.example.wifiscan.activity_wifi_scan}: java.lang.ClassNotFoundException: com.example.wifiscan.activity_wifi_scan
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.os.Looper.loop(Looper.java:137)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at android.app.ActivityThread.main(ActivityThread.java:4424)
01-02 11:08:27.324: E/AndroidRuntime(1045):     at …