Question

所以我使用以下代码的目的是简单地启动此活动一次，获取APIKEY，存储它，然后启动使用该APIKEY的主要活动。此活动只是一个EditText对话框，向用户提供APIKEY，一旦输入，单击确定按钮，我想检查APIKEY并确保它不为空，然后再也不显示此活动，只需启动主未来的活动。

当前问题：活动仍在启动，但它只是简单的null，没有EditText弹出窗口，也从不向主活动启动Intent。有没有更好的方法来做到这一点，然后如何在下面做它！

代码

public class Welcome extends Activity {

public static final String PREFS_NAME = "MyPrefsFile";
public EditText editText;
public CheckBox dontShowAgain;
public String value;
public String apikey;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    apikey = settings.getString("apikey", "");
    getapikey();
            launchActivity();
    setContentView(R.layout.splash_screen);
}

private void launchActivity() {
    // TODO Auto-generated method stub
    Intent intent = getIntent();
    intent.setClassName("com.example.test",
            "com.example.test.CardsTesting");
    startActivity(intent);
}

public void getapikey() {
    AlertDialog.Builder adb = new AlertDialog.Builder(this);
    LayoutInflater adbInflater = LayoutInflater.from(this);
    View eulaLayout = adbInflater.inflate(R.layout.custom_dialog, null);
    dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.checkBox1);
    editText = (EditText) eulaLayout.findViewById(R.id.editText1);
    adb.setView(eulaLayout);
    adb.setTitle("API Key Needed!");
    adb.setMessage("In Order to use this application, You will need a API Key from Enphase Energy. Please input your key below to get started :)");
    adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {
            String checkBoxResult = "NOT checked";
            String value = editText.getText().toString();
            if (dontShowAgain.isChecked())
                checkBoxResult = "checked";
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("skipMessage", checkBoxResult);
            editor.putString("apikey", value);
            // Commit the edits!
            editor.commit();

            Intent intent = getIntent();
            intent.setClassName("com.example.test",
                    "com.example.test.CardsTesting");
            startActivity(intent);
            return;
        }
    });

    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    String skipMessage = settings.getString("skipMessage", "NOT checked");
    if (!skipMessage.equals("checked")) {
        // if (skipMessage !=("checked") )
        adb.setIcon(R.drawable.ic_launcher);
        adb.show();
        return;

    }
}

Answer 1

不要使用getIntent()，因为它表示启动您当前所在活动的意图。而是尝试实例化您的意图（在launchActivity()和onClick()方法中）：

 Intent intent = new Intent(Welcome.this, com.example.test.CardsTesting.class);
 startActivity(intent);

我在课堂上做了一些修改，看看是否有帮助。

public class Welcome extends Activity {

public static final String PREFS_NAME = "MyPrefsFile";
public EditText editText;
public CheckBox dontShowAgain;
public String value;
public String apikey;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    apikey = settings.getString("apikey", "");
    if (getapikey()) {
        launchActivity();
        finish(); // requests the current activity (the splash screen) to be closed
    }
    setContentView(R.layout.splash_screen);
}

private void launchActivity() {
    Intent intent = new Intent(Welcome.this, com.example.test.CardsTesting.class);
    startActivity(intent);
}

public boolean getapikey() {
    AlertDialog.Builder adb = new AlertDialog.Builder(this);
    LayoutInflater adbInflater = LayoutInflater.from(this);
    View eulaLayout = adbInflater.inflate(R.layout.custom_dialog, null);
    dontShowAgain = (CheckBox) eulaLayout.findViewById(R.id.checkBox1);
    editText = (EditText) eulaLayout.findViewById(R.id.editText1);
    adb.setView(eulaLayout);
    adb.setTitle("API Key Needed!");
    adb.setMessage("In Order to use this application, You will need a API Key from Enphase Energy. Please input your key below to get started :)");
    adb.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

    public void onClick(DialogInterface dialog, int which) {
        String checkBoxResult = "NOT checked";
        String value = editText.getText().toString();
        if (dontShowAgain.isChecked())
            checkBoxResult = "checked";
        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
        SharedPreferences.Editor editor = settings.edit();
        editor.putString("skipMessage", checkBoxResult);
        editor.putString("apikey", value);
        // Commit the edits!
        editor.commit();

        Intent intent = new Intent(Welcome.this, com.example.test.CardsTesting.class);
        startActivity(intent);
        Welcome.this.finish(); // requests the current activity (the splash screen) to be closed
        return;
    }
    });

    SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
    String skipMessage = settings.getString("skipMessage", "NOT checked");
    if (!skipMessage.equals("checked")) {
        // if (skipMessage !=("checked") )
        adb.setIcon(R.drawable.ic_launcher);
        adb.show();
        return true;
    }

    return false;
}

提示EditText输入，保存字符串，然后再也不显示

代码

1 个答案: