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我正在使用ADT中的默認login_activity.xml，我希望在設備翻轉時更改方向。我在res/layout-land目錄中有一個單獨的login_activity.xml，因爲這似乎解決了人們發現的類似問題。Android Java登錄活動方向更改
目前，該應用程序根據設備在運行時的方向加載正確的xml。如果之後翻轉設備，方向會改變，但佈局保持不變。每個xml都有不同的佈局，看起來更適合其各自的方向。
我想知道這是不是可以做，或者如果我忽略了一個工作修復。
我會發布實際運行應用程序的圖像，但我需要10個聲望才能做到這一點。
下面是我LoginActivity.java和activity_login.xml文件：
//LoginActivity.java
/** Activity which displays a login screen to the user, offering registration as well.*/
public class LoginActivity extends Activity {
/**
* Keep track of the login task to ensure we can cancel it if requested.
*/
private UserLoginTask mAuthTask = null;
// Values for email and password at the time of the login attempt.
private String mUsername;
private String mPassword;
// UI references.
private EditText mUsernameView;
private EditText mPasswordView;
private View mLoginFormView;
private View mLoginStatusView;
private TextView mLoginStatusMessageView;
private mDMI app;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
app = (mDMI) getApplication();
setContentView(R.layout.activity_login);
// Set up the login form.
mUsernameView = (EditText) findViewById(R.id.username);
mUsernameView.setText(mUsername);
mPasswordView = (EditText) findViewById(R.id.password);
mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
if ((id == R.id.login) || (id == EditorInfo.IME_NULL)) {
attemptLogin();
return true;
}
return false;
}
});
mLoginFormView = findViewById(R.id.login_form);
mLoginStatusView = findViewById(R.id.login_status);
mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);
findViewById(R.id.sign_in_button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
}
});
findViewById(R.id.getUniqueHardwareID).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String id = app.getDeviceId().getID();
AlertDialog ad = new AlertDialog.Builder(v.getContext()).create();
ad.setCancelable(false);
ad.setTitle("Device ID");
ad.setMessage("The Unqiue ID for this device is: \n" + id);
ad.setButton(DialogInterface.BUTTON_POSITIVE, "Ok", (Message) null);
ad.show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.login, menu);
return true;
}
/**
* Attempts to sign in or register the account specified by the login form. If there are form errors (invalid email,
* missing fields, etc.), the errors are presented and no actual login attempt is made.
*/
public void attemptLogin() {
if (mAuthTask != null) {
return;
}
// Reset errors.
mUsernameView.setError(null);
mPasswordView.setError(null);
// Store values at the time of the login attempt.
mUsername = mUsernameView.getText().toString();
mPassword = mPasswordView.getText().toString();
boolean cancel = false;
View focusView = null;
// Check for a valid password.
if (TextUtils.isEmpty(mPassword)) {
mPasswordView.setError(getString(R.string.error_field_required));
focusView = mPasswordView;
cancel = true;
} else if (mPassword.length() < 4) {
mPasswordView.setError(getString(R.string.error_invalid_password));
focusView = mPasswordView;
cancel = true;
}
// Check for a valid email address.
if (TextUtils.isEmpty(mUsername)) {
mUsernameView.setError(getString(R.string.error_field_required));
focusView = mUsernameView;
cancel = true;
}
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
} else {
// Show a progress spinner, and kick off a background task to
// perform the user login attempt.
Intent myIntent = new Intent(this.getBaseContext(), MainActivity.class); // hopefully this will switch to
// the
// MainActivity
startActivity(myIntent);
finish();
mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
showProgress(true);
mAuthTask = new UserLoginTask();
mAuthTask.execute((Void) null);
}
}
/**
* Shows the progress UI and hides the login form.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
private void showProgress(final boolean show) {
// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
// for very easy animations. If available, use these APIs to fade-in
// the progress spinner.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime);
mLoginStatusView.setVisibility(View.VISIBLE);
mLoginStatusView.animate().setDuration(shortAnimTime).alpha(show ? 1 : 0)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
}
});
mLoginFormView.setVisibility(View.VISIBLE);
mLoginFormView.animate().setDuration(shortAnimTime).alpha(show ? 0 : 1)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
}
});
} else {
// The ViewPropertyAnimator APIs are not available, so simply show
// and hide the relevant UI components.
mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
}
}
/**
* Represents an asynchronous login/registration task used to authenticate the user.
*/
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
// TODO: attempt authentication against a network service.
try {
// Simulate network access.
Thread.sleep(2000);
} catch (InterruptedException e) {
return false;
}
// TODO: register the new account here.
return true;
}
@Override
protected void onPostExecute(final Boolean success) {
mAuthTask = null;
showProgress(false);
if (success) {
finish();
} else {
mPasswordView.setError(getString(R.string.error_incorrect_password));
mPasswordView.requestFocus();
}
}
@Override
protected void onCancelled() {
mAuthTask = null;
showProgress(false);
}
}
}
立式登錄活動
//vertical activity_login.xml
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".LoginActivity" >
<!-- Login progress -->
<LinearLayout
android:id="@+id/login_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:orientation="vertical"
android:visibility="gone"
>
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp" />
<TextView
android:id="@+id/login_status_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:fontFamily="sans-serif-light"
android:text="@string/login_progress_signing_in"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
<!-- Login form -->
<ScrollView
android:id="@+id/login_form"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="5" >
<LinearLayout
style="@style/LoginFormContainer"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="top|center_horizontal"
android:layout_weight="2"
android:scaleType="fitXY"
android:src="@drawable/spashscreen" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center|bottom"
android:layout_weight="3"
android:orientation="vertical" >
<EditText
android:id="@+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_username"
android:inputType="text"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="@+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_password"
android:imeActionId="@+id/login"
android:imeActionLabel="@string/action_sign_in_short"
android:imeOptions="actionUnspecified"
android:inputType="textPassword"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="@+id/serverInfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_address" />
<Button
android:id="@+id/sign_in_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:paddingLeft="32dp"
android:paddingRight="32dp"
android:text="@string/action_sign_in_short" />
<Button
android:id="@+id/getUniqueHardwareID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/show_device_id" />
</LinearLayout>
<!-- Make this uneditable if the mobile device has a value listed locally -->
</LinearLayout>
</ScrollView>
</merge>
水平活動登錄
//horizontal activity_login.xml
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".LoginActivity" >
<!-- Login progress -->
<LinearLayout
android:id="@+id/login_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:orientation="horizontal"
android:visibility="gone"
>
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp" />
<TextView
android:id="@+id/login_status_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:fontFamily="sans-serif-light"
android:text="@string/login_progress_signing_in"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
<!-- Login form -->
<ScrollView
android:id="@+id/login_form"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="5" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_weight="2"
android:scaleType="matrix"
android:src="@drawable/spashscreen" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_weight="3"
android:orientation="vertical" >
<EditText
android:id="@+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_username"
android:inputType="text"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="@+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_password"
android:imeActionId="@+id/login"
android:imeActionLabel="@string/action_sign_in_short"
android:imeOptions="actionUnspecified"
android:inputType="textPassword"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="@+id/serverInfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/prompt_address" />
<Button
android:id="@+id/sign_in_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:paddingLeft="32dp"
android:paddingRight="32dp"
android:text="@string/action_sign_in_short" />
<Button
android:id="@+id/getUniqueHardwareID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/show_device_id" />
</LinearLayout>
</LinearLayout>
</ScrollView>
你需要5個以上 –