ボタンのクリックで警告ダイアログを開始しました。ユーザー名とパスワードがあり、警告ダイアログが起動した後、[OK]ボタンを押すと、強制的に閉じてアプリを閉じます。
どんな助けでも大歓迎です。
public class MainActivity extends Activity {
final Context context = this;
private Button button;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv=(TextView)findViewById(R.id.introclusion_tv1);
tv.setTypeface(FontFactory.getBFantezy(getBaseContext()));
TextView tv1=(TextView)findViewById(R.id.introclusion_tv2);
tv1.setTypeface(FontFactory.getBFantezy(getBaseContext()));
tv1.setText(Html.fromHtml(getString(R.string.introclusion)));
button = (Button) findViewById(R.id.button1);
// add button listener
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
LayoutInflater li = LayoutInflater.from(context);
View dialog_layoutView = li.inflate(R.layout.dialog_layout, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder.setView(dialog_layoutView);
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
EditText username = (EditText) findViewById(R.id.txt_name);
EditText password = (EditText) findViewById(R.id.password);
if(username.getText().toString().length() > 0 && password.getText().toString().length() > 0 ) {
if(username.getText().toString().equals("test") && password.getText().toString().equals("test")) {
Intent intent = new Intent(MainActivity.this,Text.class);
startActivity(intent);
finish();}
else{
// get your custom_toast.xml layout
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.custom_toast,
(ViewGroup) findViewById(R.id.custom_toast));
// set a dummy image
ImageView image = (ImageView) layout.findViewById(R.id.image_toast);
image.setImageResource(R.drawable.ic_launcher);
// set a message
TextView text = (TextView) layout.findViewById(R.id.text_toast);
text.setText("Wrong username or password");
// Toast...
Toast toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();}}}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
});
}
}
ログキャット:
java.lang.NullPointerException
at com.example.demo.MainActivity$1$1.onClick(MainActivity.java:63)
at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:163)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
dialog_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="10sp" >
<EditText
android:id="@+id/txt_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/dialog_uname"
android:singleLine="true" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" >
</EditText>