feat(example): add precomputed client demo #241
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| package cloud.eppo.androidexample; | ||
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| import android.os.Bundle; | ||
| import android.text.TextUtils; | ||
| import android.util.Log; | ||
| import android.view.MenuItem; | ||
| import android.view.View; | ||
| import android.widget.Button; | ||
| import android.widget.EditText; | ||
| import android.widget.LinearLayout; | ||
| import android.widget.RadioGroup; | ||
| import android.widget.ScrollView; | ||
| import android.widget.TextView; | ||
| import androidx.appcompat.app.AppCompatActivity; | ||
| import cloud.eppo.android.EppoPrecomputedClient; | ||
| import cloud.eppo.api.Attributes; | ||
| import cloud.eppo.api.EppoValue; | ||
| import com.geteppo.androidexample.BuildConfig; | ||
| import com.geteppo.androidexample.R; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
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| /** | ||
| * Example activity demonstrating the EppoPrecomputedClient. The precomputed client computes all | ||
| * flag assignments server-side for a specific subject, providing instant lookups. | ||
| */ | ||
| public class PrecomputedActivity extends AppCompatActivity { | ||
| private static final String TAG = PrecomputedActivity.class.getSimpleName(); | ||
| private static final String API_KEY = BuildConfig.API_KEY; | ||
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| private EditText subjectInput; | ||
| private EditText flagKeyInput; | ||
| private RadioGroup flagTypeGroup; | ||
| private TextView assignmentLog; | ||
| private ScrollView assignmentLogScrollView; | ||
| private TextView statusText; | ||
| private LinearLayout attributesContainer; | ||
| private Button getAssignmentButton; | ||
| private List<View> attributeRows = new ArrayList<>(); | ||
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| private EppoPrecomputedClient precomputedClient; | ||
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| @Override | ||
| protected void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
| setContentView(R.layout.activity_precomputed); | ||
|
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| // Enable the action bar back button | ||
| if (getSupportActionBar() != null) { | ||
| getSupportActionBar().setDisplayHomeAsUpEnabled(true); | ||
| getSupportActionBar().setTitle("Precomputed Client"); | ||
| } | ||
|
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| subjectInput = findViewById(R.id.precomputed_subject); | ||
| flagKeyInput = findViewById(R.id.precomputed_flag_key); | ||
| flagTypeGroup = findViewById(R.id.flag_type_group); | ||
| assignmentLog = findViewById(R.id.precomputed_assignment_log); | ||
| assignmentLogScrollView = findViewById(R.id.precomputed_assignment_log_scrollview); | ||
| statusText = findViewById(R.id.precomputed_status); | ||
| attributesContainer = findViewById(R.id.attributes_container); | ||
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| findViewById(R.id.btn_init_server).setOnClickListener(view -> initializeClient(false)); | ||
| findViewById(R.id.btn_init_disk).setOnClickListener(view -> initializeClient(true)); | ||
| getAssignmentButton = findViewById(R.id.btn_get_assignment); | ||
| getAssignmentButton.setEnabled(false); | ||
| getAssignmentButton.setOnClickListener(view -> getAssignment()); | ||
| findViewById(R.id.btn_add_attribute).setOnClickListener(view -> addAttributeRow("", "")); | ||
|
|
||
| // Add default attributes | ||
| addAttributeRow("platform", "android"); | ||
| addAttributeRow("appVersion", BuildConfig.VERSION_NAME); | ||
| } | ||
|
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| private void addAttributeRow(String key, String value) { | ||
| LinearLayout row = new LinearLayout(this); | ||
| row.setOrientation(LinearLayout.HORIZONTAL); | ||
| row.setLayoutParams( | ||
| new LinearLayout.LayoutParams( | ||
| LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); | ||
|
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| EditText keyInput = new EditText(this); | ||
| keyInput.setHint("Key"); | ||
| keyInput.setText(key); | ||
| LinearLayout.LayoutParams keyParams = | ||
| new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f); | ||
| keyInput.setLayoutParams(keyParams); | ||
| keyInput.setTag("key"); | ||
|
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| EditText valueInput = new EditText(this); | ||
| valueInput.setHint("Value"); | ||
| valueInput.setText(value); | ||
| LinearLayout.LayoutParams valueParams = | ||
| new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f); | ||
| valueParams.setMarginStart(8); | ||
| valueInput.setLayoutParams(valueParams); | ||
| valueInput.setTag("value"); | ||
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| Button removeButton = new Button(this); | ||
| removeButton.setText("X"); | ||
| removeButton.setMinWidth(0); | ||
| removeButton.setMinHeight(0); | ||
| removeButton.setMinimumWidth(0); | ||
| removeButton.setMinimumHeight(0); | ||
| removeButton.setPadding(16, 8, 16, 8); | ||
| LinearLayout.LayoutParams removeParams = | ||
| new LinearLayout.LayoutParams( | ||
| LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); | ||
| removeParams.setMarginStart(8); | ||
| removeButton.setLayoutParams(removeParams); | ||
| removeButton.setOnClickListener( | ||
| v -> { | ||
| attributesContainer.removeView(row); | ||
| attributeRows.remove(row); | ||
| }); | ||
|
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| row.addView(keyInput); | ||
| row.addView(valueInput); | ||
| row.addView(removeButton); | ||
|
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| attributesContainer.addView(row); | ||
| attributeRows.add(row); | ||
| } | ||
|
|
||
| private Attributes collectAttributes() { | ||
| Attributes attributes = new Attributes(); | ||
| for (View row : attributeRows) { | ||
| EditText keyInput = row.findViewWithTag("key"); | ||
| EditText valueInput = row.findViewWithTag("value"); | ||
| if (keyInput != null && valueInput != null) { | ||
| String key = keyInput.getText().toString().trim(); | ||
| String value = valueInput.getText().toString().trim(); | ||
| if (!key.isEmpty()) { | ||
| // Try to parse as number first | ||
| try { | ||
| double numValue = Double.parseDouble(value); | ||
| attributes.put(key, EppoValue.valueOf(numValue)); | ||
| } catch (NumberFormatException e) { | ||
| // Use as string | ||
| attributes.put(key, EppoValue.valueOf(value)); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return attributes; | ||
| } | ||
|
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| private void initializeClient(boolean offlineMode) { | ||
| String subjectKey = subjectInput.getText().toString(); | ||
| if (TextUtils.isEmpty(subjectKey)) { | ||
| appendToLog("Subject ID is required"); | ||
| return; | ||
| } | ||
|
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| String source = offlineMode ? "disk" : "server"; | ||
| statusText.setText("Initializing from " + source + "..."); | ||
| appendToLog( | ||
| "Initializing precomputed client for subject: " + subjectKey + " (from " + source + ")"); | ||
|
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| // Collect subject attributes from the UI | ||
| Attributes subjectAttributes = collectAttributes(); | ||
| appendToLog("Subject attributes: " + subjectAttributes.size() + " attributes"); | ||
|
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||
| new EppoPrecomputedClient.Builder(API_KEY, getApplication()) | ||
| .subjectKey(subjectKey) | ||
| .subjectAttributes(subjectAttributes) | ||
| .isGracefulMode(true) | ||
| .forceReinitialize(true) | ||
| .offlineMode(offlineMode) | ||
| .assignmentLogger( | ||
| assignment -> { | ||
| Log.d( | ||
| TAG, | ||
| "Assignment logged: " | ||
| + assignment.getFeatureFlag() | ||
| + " -> " | ||
| + assignment.getVariation()); | ||
| }) | ||
| .buildAndInitAsync() | ||
| .thenAccept( | ||
| client -> { | ||
| precomputedClient = client; | ||
| runOnUiThread( | ||
| () -> { | ||
| statusText.setText("Initialized for: " + subjectKey + " (from " + source + ")"); | ||
| appendToLog("Client initialized successfully from " + source + "!"); | ||
| getAssignmentButton.setEnabled(true); | ||
| }); | ||
| }) | ||
| .exceptionally( | ||
| error -> { | ||
| Log.e(TAG, "Failed to initialize", error); | ||
| runOnUiThread( | ||
| () -> { | ||
| statusText.setText("Initialization failed"); | ||
| appendToLog("Error: " + error.getMessage()); | ||
| }); | ||
| return null; | ||
| }); | ||
| } | ||
|
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| private void getAssignment() { | ||
| if (precomputedClient == null) { | ||
| appendToLog("Client not initialized. Click 'From Server' or 'From Disk' first."); | ||
| return; | ||
| } | ||
|
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| String flagKey = flagKeyInput.getText().toString(); | ||
| if (TextUtils.isEmpty(flagKey)) { | ||
| appendToLog("Flag key is required"); | ||
| return; | ||
| } | ||
|
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| int selectedTypeId = flagTypeGroup.getCheckedRadioButtonId(); | ||
| String result; | ||
|
|
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| try { | ||
| if (selectedTypeId == R.id.type_string) { | ||
| result = precomputedClient.getStringAssignment(flagKey, "(default)"); | ||
| appendToLog("String assignment for '" + flagKey + "': " + result); | ||
| } else if (selectedTypeId == R.id.type_boolean) { | ||
| boolean boolResult = precomputedClient.getBooleanAssignment(flagKey, false); | ||
| appendToLog("Boolean assignment for '" + flagKey + "': " + boolResult); | ||
| } else if (selectedTypeId == R.id.type_integer) { | ||
| int intResult = precomputedClient.getIntegerAssignment(flagKey, 0); | ||
| appendToLog("Integer assignment for '" + flagKey + "': " + intResult); | ||
| } else if (selectedTypeId == R.id.type_numeric) { | ||
| double numericResult = precomputedClient.getNumericAssignment(flagKey, 0.0); | ||
| appendToLog("Numeric assignment for '" + flagKey + "': " + numericResult); | ||
| } else if (selectedTypeId == R.id.type_json) { | ||
| // JSON assignments return JsonNode - for simplicity, we show as string | ||
| appendToLog("JSON assignment for '" + flagKey + "': (use getJSONAssignment() API)"); | ||
|
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There was a problem hiding this comment. Could you do and stringify it with |
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| } else { | ||
| appendToLog("Please select a flag type"); | ||
| } | ||
| } catch (Exception e) { | ||
| appendToLog("Error getting assignment: " + e.getMessage()); | ||
| } | ||
| } | ||
|
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| private void appendToLog(String message) { | ||
| assignmentLog.append(message + "\n\n"); | ||
| assignmentLogScrollView.post(() -> assignmentLogScrollView.fullScroll(View.FOCUS_DOWN)); | ||
| } | ||
|
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| @Override | ||
| public boolean onOptionsItemSelected(MenuItem item) { | ||
| if (item.getItemId() == android.R.id.home) { | ||
| finish(); | ||
| return true; | ||
| } | ||
| return super.onOptionsItemSelected(item); | ||
| } | ||
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| @Override | ||
| public void onPause() { | ||
| super.onPause(); | ||
| if (precomputedClient != null) { | ||
| precomputedClient.pausePolling(); | ||
| } | ||
| } | ||
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| @Override | ||
| public void onResume() { | ||
| super.onResume(); | ||
| if (precomputedClient != null) { | ||
| precomputedClient.resumePolling(); | ||
| } | ||
| } | ||
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| @Override | ||
| public void onDestroy() { | ||
| super.onDestroy(); | ||
| if (precomputedClient != null) { | ||
| precomputedClient.stopPolling(); | ||
| } | ||
| } | ||
| } | ||
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Is it common to create UI components programmatically like this in Android? 😮
Also
.setMinWidthand.setMinimumWidthare different?