Status Bar and Network Information<\/li>\n<\/ul>\n3. Setting Required Permissions<\/h3>\n
\n To obtain certain information in Android, permissions must be added to the app’s manifest file. For example, to check the network status, the following permissions are needed:\n <\/p>\n
\n <uses-permission android:name=\"android.permission.ACCESS_NETWORK_STATE\"\/>\n <uses-permission android:name=\"android.permission.INTERNET\"\/>\n <\/pre>\n4. Obtaining Smartphone Information with Java<\/h3>\n4.1 Device Model and Manufacturer Information<\/h4>\n
\n To get the device model and manufacturer information, use the Build<\/code> class. Here is an example code:\n <\/p>\n\n import android.os.Build;\n\n String deviceModel = Build.MODEL; \/\/ Device Model\n String manufacturer = Build.MANUFACTURER; \/\/ Manufacturer\n <\/pre>\n4.2 Android Version Information<\/h4>\n
\n Android version information can be accessed through the Build.VERSION<\/code> class. For example, you can obtain the current Android version as follows:\n <\/p>\n\n String androidVersion = Build.VERSION.RELEASE; \/\/ Android Version\n <\/pre>\n4.3 Checking Network Status<\/h4>\n
\n To check the network status, use ConnectivityManager<\/code>. The following code is an example that checks the status of the currently connected network:\n <\/p>\n\n import android.content.Context;\n import android.net.ConnectivityManager;\n import android.net.NetworkInfo;\n\n ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);\n NetworkInfo activeNetwork = cm.getActiveNetworkInfo();\n boolean isConnected = activeNetwork != null && activeNetwork.isConnectedOrConnecting();\n <\/pre>\n5. Implementing Example App<\/h3>\n
\n Let’s implement a simple example app that displays smartphone information. This app will show the device model, manufacturer, and Android version information on the screen.\n <\/p>\n
5.1 XML Layout File<\/h4>\n
\n First, create the res\/layout\/activity_main.xml<\/code> file. Add a TextView as follows:\n <\/p>\n\n <?xml version=\"1.0\" encoding=\"utf-8\"?>\n <RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\">\n\n <TextView\n android:id=\"@+id\/device_info\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Device Information\"\n android:textSize=\"18sp\"\/>\n\n <\/RelativeLayout>\n <\/pre>\n5.2 MainActivity.java<\/h4>\n
\n Next, modify the MainActivity.java<\/code> file to display the information on the screen:\n <\/p>\n\n import android.app.Activity;\n import android.os.Bundle;\n import android.widget.TextView;\n import android.os.Build;\n\n public class MainActivity extends Activity {\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n TextView deviceInfoTextView = findViewById(R.id.device_info);\n String deviceModel = Build.MODEL;\n String manufacturer = Build.MANUFACTURER;\n String androidVersion = Build.VERSION.RELEASE;\n\n String deviceInfo = \"Manufacturer: \" + manufacturer + \n \"\\nModel: \" + deviceModel + \n \"\\nAndroid Version: \" + androidVersion;\n\n deviceInfoTextView.setText(deviceInfo);\n }\n }\n <\/pre>\n6. Conclusion<\/h3>\n
\n Through this, we have created a simple smartphone information checker app. Such information can provide value to users and is essential for implementing various features in an app. To delve deeper, it is also good to learn how to gather more information through APIs.\n <\/p>\n
7. Next Course Preview<\/h3>\n
\n In the next course, we will learn how to receive external information using Google APIs. The world of Android app development is vast, and we will continue to learn various technologies in the future.\n <\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
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