如何在 Android 應用程式中新增新聯絡人?
本示例展示瞭如何在 Android 應用程式中新增新聯絡人。
步驟 1 − 在 Android Studio 中建立一個新專案,轉到 File ⇒ New Project 填寫所有必需的資訊以建立一個新專案。
步驟 2 − 將以下程式碼新增到 res/layout/activity_main.xml
<? xml version= "1.0" encoding= "utf-8" ?> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android :layout_width= "match_parent" android :layout_height= "match_parent" android :layout_margin= "16dp" android :orientation= "vertical" tools :context= ".MainActivity" > <EditText android :id= "@+id/etContactName" android :layout_width= "match_parent" android :layout_height= "wrap_content" android :hint= "Contact name" android :inputType= "text" /> <EditText android :id= "@+id/etContactNumber" android :layout_width= "match_parent" android :layout_height= "wrap_content" android :hint= "Contact number" android :inputType= "number" /> <Button android :layout_width= "match_parent" android :layout_height= "wrap_content" android :onClick= "addContact" android :text= "ADD" /> </LinearLayout>
步驟 3 − 將以下程式碼新增到 src/MainActivity
package app.tutorialspoint.com.sample ; import android.app.Activity ; import android.content.Intent ; import android.os.Bundle ; import android.provider.ContactsContract ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.EditText ; import android.widget.Toast ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; } public void addContact (View view) { EditText etContactName = findViewById(R.id. etContactName ) ; EditText etContactNumber = findViewById(R.id. etContactNumber ) ; String name = etContactName.getText().toString() ; String phone = etContactNumber.getText().toString() ; Intent contactIntent = new Intent(ContactsContract.Intents.Insert. ACTION ) ; contactIntent.setType(ContactsContract.RawContacts. CONTENT_TYPE ) ; contactIntent .putExtra(ContactsContract.Intents.Insert. NAME , name) .putExtra(ContactsContract.Intents.Insert. PHONE , phone) ; startActivityForResult(contactIntent , 1 ) ; } @Override protected void onActivityResult ( int requestCode , int resultCode , Intent intent) { super .onActivityResult(requestCode , resultCode , intent) ; if (requestCode == 1 ) { if (resultCode == Activity. RESULT_OK ) { Toast. makeText ( this, "Added Contact" , Toast. LENGTH_SHORT ).show() ; } if (resultCode == Activity. RESULT_CANCELED ) { Toast. makeText ( this, "Cancelled Added Contact" , Toast. LENGTH_SHORT ).show() ; } } } }
步驟 6 − 將以下程式碼新增到 androidManifest.xml
<? xml version= "1.0" encoding= "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package= "app.tutorialspoint.com.sample" > <uses-permission android :name= "android.permission.CALL_PHONE" /> <application android :allowBackup= "true" android :icon= "@mipmap/ic_launcher" android :label= "@string/app_name" android :roundIcon= "@mipmap/ic_launcher_round" android :supportsRtl= "true" android :theme= "@style/AppTheme" > <activity android :name= ".MainActivity" > <intent-filter> <action android :name= "android.intent.action.MAIN" /> <category android :name= "android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android :name= ".DeviceAdmin" android :description= "@string/app_description" android :label= "@string/app_name" android :permission= "android.permission.BIND_DEVICE_ADMIN" > <meta-data android :name= "android.app.device_admin" android :resource= "@xml/policies" /> <intent-filter> <action android :name= "android.app.action.DEVICE_ADMIN_ENABLED" /> </intent-filter> </receiver> </application> </manifest>
讓我們嘗試執行你的應用程式。我假設你已將真正的 Android 移動裝置連線到電腦。要從 Android Studio 執行應用程式,請開啟一個專案的活動檔案,然後單擊工具欄中的執行 圖示。選擇移動裝置作為選項,然後檢視移動裝置,它會顯示預設螢幕 –
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