Set up Android SDK

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import com.launchdarkly.sdk.*
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import com.launchdarkly.sdk.android.*;
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import com.launchdarkly.sdk.android.LDConfig.Builder.AutoEnvAttributes
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// This is your mobile key.
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val ldConfig = LDConfig.Builder(AutoEnvAttributes.Enabled)
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    .mobileKey("YOUR_MOBILE_KEY")
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    .build()
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// A "context" is a data object representing users, devices, organizations, and other entities.
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val context = LDContext.create("EXAMPLE_CONTEXT_KEY")
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// If you don't want to block execution while the SDK tries to get
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// latest flags, move this code into an async IO task and await on its completion.
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val client: LDClient = LDClient.init(this@BaseApplication, ldConfig, context, 5)

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import com.launchdarkly.sdk.*
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import com.launchdarkly.sdk.android.*
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import com.launchdarkly.sdk.android.LDConfig.Builder.AutoEnvAttributes
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// This is your mobile key.
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val ldConfig = LDConfig.Builder(AutoEnvAttributes.Enabled)
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    .mobileKey("YOUR_MOBILE_KEY")
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    .build()
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// A "context" is a data object representing users, devices, organizations, and other entities.
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val context = LDContext.create("EXAMPLE_CONTEXT_KEY")
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// If you don't want to block execution while the SDK tries to get
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// latest flags, move this code into an async IO task and await on its completion.
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val client: LDClient = LDClient.init(this@BaseApplication, ldConfig, context, 5)
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// Call trackMetric when a metric action occurs in your app —
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// a tap, a form submit, a screen view, a custom event, whatever your metric measures.
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fun trackMetric(metricKey: String, data: LDValue = LDValue.ofNull()) {
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    LDClient.get().trackData(metricKey, data)
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}