怎么把主线程getText()得到的String放进子线程

不一定非要定义全局变量，我修改的如下，你运行看看，不行再定义全局变量。修改了3个地方
public class StartLoginActivity extends Activity {

// 账号输入框
private EditText inputAccount;

//密码输入框
private EditText inputPassword;

// 登录按钮
private Button loginButton;

//private GlobalVariable mGlobalVariable;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);

//透明状态栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//透明导航栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

inputAccount = (EditText) findViewById(R.id.account_edittext);
inputPassword = (EditText) findViewById(R.id.password_edittext);
    //1.
    **final String strInputAccount =  inputAccount.getText().toString();
    final String strInputPassword = inputPassword.getText().toString();**

Button loginButton = (Button) findViewById(R.id.login_button);
loginButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View source) {
        //2.
                    //new GeocodeingTask().execute( mGlobalVariable.account = inputAccount.getText().toString(), mGlobalVariable.password = inputPassword.getText().toString());
                    new GeocodeingTask().execute(strInputAccount , strInputPassword);
    }
});

}

public class GeocodeingTask extends AsyncTask> {

@Override
protected List<GlobalVariable> doInBackground(String... params) {

//3.这里不定参数params是异步任务传入的参数
//params[0]对应的是传入的strInputAccount，parmas[1]对应的是传入的strInputPassword
String json = RequestUtil.RequestJson("http://wechat.svner.com/login.php", "POST", params[1]);
Gson gson = new Gson();
class tmp {
public int result;
}
System.out.println(json);
tmp n = gson.fromJson(json, tmp.class);
if (n.result == 0) {
Toast.makeText(getApplicationContext(), "账号或密码错误", Toast.LENGTH_SHORT).show();
System.out.print("error============================");
} else {
Intent intent = new Intent(StartLoginActivity.this, StartMainBodyActivity.class);
startActivity(intent);
}
return null;
}
}
}

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public class GlobalVariable {
public String account;
public String password;
}

用全局变量。。。在外面定义String

在new GeocodeingTask().execute(password)中传入，记得把password 加final修饰。
然后在doInBackGround（Integer... params）中 修改成oInBackGround（String... params）再把你现在的password引用改成params[0]就好了

通过全局变量或者线程通信的方式传递

定义一个全局变量或者作为参数传递给你的异步任务

public class StartLoginActivity extends Activity {

// 账号输入框
private EditText inputAccount;

//密码输入框
private EditText inputPassword;

// 登录按钮
private Button loginButton;

private GlobalVariable mGlobalVariable;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login);

    //透明状态栏
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    //透明导航栏
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

    inputAccount = (EditText) findViewById(R.id.account_edittext);
    inputPassword = (EditText) findViewById(R.id.password_edittext);

    Button loginButton = (Button) findViewById(R.id.login_button);
    loginButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View source) {
            new GeocodeingTask().execute( mGlobalVariable.account = inputAccount.getText().toString(), mGlobalVariable.password = inputPassword.getText().toString());
        }
    });
}

public class GeocodeingTask extends AsyncTask<String, Void, List<GlobalVariable>> {

    @Override
    protected List<GlobalVariable> doInBackground(String... params) {

        String json = RequestUtil.RequestJson("http://wechat.svner.com/login.php", "POST", params[0]);
        Gson gson = new Gson();
        class tmp {
            public int result;
        }
        System.out.println(json);
        tmp n = gson.fromJson(json, tmp.class);
        if (n.result == 0) {
            Toast.makeText(getApplicationContext(), "账号或密码错误", Toast.LENGTH_SHORT).show();
            System.out.print("error============================");
        } else {
            Intent intent = new Intent(StartLoginActivity.this, StartMainBodyActivity.class);
            startActivity(intent);
        }
        return null;
    }
}

}

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public class GlobalVariable {
public String account;
public String password;
}

loop或者handler