[英]How to change image in main-activity based on date in android application
[英]How do I reduce alert-dialogue code from main-activity in android?
我有一堂課,我在寫三種不同的警報對話框。 這三個警報對話框極大地擴展了此類代碼的范圍。 因此,出於重構目的,我想為三個警報對話框創建基類,並在主要活動中使用該類。 誰能建議我如何實現這一目標? 我的三個警報對話框如下:
public boolean onJsConfirm(WebView view, String url, String message,
final android.webkit.JsResult result) {
new AlertDialog.Builder(currentActivity)
.setTitle("Confirmation")
.setMessage(message)
.setPositiveButton(android.R.string.yes,
new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
result.confirm();
}
})
.setNegativeButton(android.R.string.no,
new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
result.cancel();
}
}).setCancelable(false).create().show();
return true;
}
public boolean onJsAlert(WebView view, String url, String message,
final android.webkit.JsResult result) {
new AlertDialog.Builder(currentActivity)
.setTitle("Alert !")
.setMessage(message)
.setPositiveButton(android.R.string.ok,
new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
result.confirm();
}
}).setCancelable(false).create().show();
return true;
}
public void onGeolocationPermissionsShowPrompt(final String origin,
final GeolocationPermissions.Callback callback) {
final boolean remember = true;
AlertDialog.Builder builder = new AlertDialog.Builder(
WebviewActivity.this);
builder.setTitle("Locations");
builder.setMessage(" Would like to use your Current Location")
.setCancelable(true)
.setPositiveButton("Allow",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int id) {
callback.invoke(origin, true, remember);
SharedPreferences pref = currentActivity
.getPreferences(currentActivity.MODE_PRIVATE);
SharedPreferences.Editor editor = pref
.edit();
editor.putBoolean("isLocationAvailable",
true);
editor.commit();
webview.loadUrl(getUrl(gps.getLatitude(),
gps.getLongitude(), "true"));
}
})
.setNegativeButton("Don't Allow",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int id) {
callback.invoke(origin, false, remember);
webview.loadUrl(getUrl("", "", "false"));
}
});
AlertDialog alert = builder.create();
alert.show();
完整的解決方案嘗試這是一個通用警報對話框,其中包含皮膚傾斜,消息,是,沒有按鈕標題
1)創建界面
import android.content.DialogInterface;
public interface AlertMagnatic {
public abstract void PositiveMethod(DialogInterface dialog, int id);
public abstract void NegativeMethod(DialogInterface dialog, int id);
}
2)確認對話框的概括方法。
public static void getConfirmDialog(Context mContext,String title, String msg, String positiveBtnCaption, String negativeBtnCaption, boolean isCancelable, final AlertMagnatic target) {
AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
int imageResource = android.R.drawable.ic_dialog_alert;
Drawable image = mContext.getResources().getDrawable(imageResource);
builder.setTitle(title).setMessage(msg).setIcon(image).setCancelable(false).setPositiveButton(positiveBtnCaption, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
target.PositiveMethod(dialog, id);
}
}).setNegativeButton(negativeBtnCaption, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
target.NegativeMethod(dialog, id);
}
});
AlertDialog alert = builder.create();
alert.setCancelable(isCancelable);
alert.show();
if (isCancelable) {
alert.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface arg0) {
target.NegativeMethod(null, 0);
}
});
}
}
3)使用方法
getConfirmDialog(getString(R.string.logout), getString(R.string.logout_message), getString(R.string.yes), getString(R.string.no), false,
new AlertMagnatic() {
@Override
public void PositiveMethod(final DialogInterface dialog, final int id) {}
@Override
public void NegativeMethod(DialogInterface dialog, int id) {
}
});
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