38059ec324
The state is saved to a preference file, but that is abstracted from the SwapWorkflowActivity. It interacts with a SwapState object, which is relatively safe in that you should not be able to save it into an invalid state. Note: At this point it is not tied to any service. I'm not sure it will ever have to be either, as the service needs to persist state somewhere anyway, so that will probably also end up saving to a preferences file too.
74 lines
2.2 KiB
Java
74 lines
2.2 KiB
Java
package org.fdroid.fdroid.localrepo;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.support.annotation.IntDef;
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import android.support.annotation.NonNull;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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public class SwapState {
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private static final String SHARED_PREFERENCES = "swap-state";
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public static final int STEP_INTRO = 1;
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public static final int STEP_SELECT_APPS = 2;
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public static final int STEP_JOIN_WIFI = 3;
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public static final int STEP_SHOW_NFC = 4;
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public static final int STEP_WIFI_QR = 5;
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private int step;
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@NonNull
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private final Context context;
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private SwapState(@NonNull Context context) {
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this.context = context;
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}
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/**
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* Current screen that the swap process is up to.
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* Will be one of the SwapState.STEP_* values.
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*/
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@SwapStep
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public int getStep() {
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return step;
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}
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public SwapState setStep(@SwapStep int step) {
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this.step = step;
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persist();
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return this;
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}
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private static final String KEY_STEP = "step";
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@NonNull
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public static SwapState load(@NonNull Context context) {
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SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, Context.MODE_PRIVATE);
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@SwapStep int step = preferences.getInt(KEY_STEP, STEP_INTRO);
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return new SwapState(context)
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.setStep(step);
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}
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private void persist() {
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SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, Context.MODE_APPEND);
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preferences.edit()
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.putInt(KEY_STEP, step)
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.commit();
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}
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/**
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* Ensure that we don't get put into an incorrect state, by forcing people to pass valid
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* states to setStep. Ideally this would be done by requiring an enum or something to
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* be passed rather than in integer, however that is harder to persist on disk than an int.
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* This is the same as, e.g. {@link Context#getSystemService(String)}
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*/
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@IntDef({STEP_INTRO, STEP_SELECT_APPS, STEP_JOIN_WIFI, STEP_SHOW_NFC, STEP_WIFI_QR})
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@Retention(RetentionPolicy.SOURCE)
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public @interface SwapStep {}
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}
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