Android上机实验-5 开发组件的使用

1. package com.example.myapplication02;
2. 
3. import androidx.annotation.Nullable;
4. import androidx.appcompat.app.AppCompatActivity;
5. import android.content.Intent;
6. import android.database.Cursor;
7. import android.net.Uri;
8. import android.os.Bundle;
9. import android.provider.ContactsContract;
10. import android.view.View;
11. import android.widget.Button;
12. import android.widget.EditText;
13. 
14. public class ActivityJump01 extends AppCompatActivity {
15. private Button btn_Send,btn_open;
16.     EditText editText;
17. @Override
18. protected void onCreate(Bundle savedInstanceState) {
19. super.onCreate(savedInstanceState);
20.         setContentView(R.layout.activity_jump01);
21.         btn_Send=findViewById(R.id.btn_Send);
22.         btn_open=findViewById(R.id.btn_open);
23.         editText=findViewById(R.id.editTextTextPersonName);
24.         Mylistener mylistener=new Mylistener();
25.         btn_Send.setOnClickListener(mylistener);
26.         btn_open.setOnClickListener(mylistener);
27.     }
28. 
29. @Override
30. protected void onActivityResult(int requestCode, int resultCode, @Nullable  Intent data) {
31. super.onActivityResult(requestCode, resultCode, data);
32. Uri contactUri = data.getData();
33.         String[] projection = new String[]{ContactsContract.CommonDataKinds.Phone.NUMBER};
34. Cursor cursor = getContentResolver().query(contactUri, projection,
35. null, null, null);
36. if (cursor != null && cursor.moveToFirst()) {
37. int numberIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
38. String number = cursor.getString(numberIndex);
39.             editText.setText(number);
40.         }
41.     }
42. 
43. class Mylistener implements View.OnClickListener{
44. @Override
45. public void onClick(View v) {
46. switch (v.getId()){
47. case R.id.btn_Send: //发送短信
48.                     Intent intent1=new Intent();
49.                     intent1.setAction(Intent.ACTION_SENDTO);
50.                     intent1.setData(Uri.parse("smsto:"+editText.getText().toString()));
51.                     intent1.putExtra("sms_body", "姓名：LWL；" + "性别：男；" + "学号：20201415204；" + "爱好：热爱学习");
52.                     startActivity(intent1);
53. break;
54. case R.id.btn_open:
55. //打开联系人界面
56. Intent intent3 = new Intent(Intent.ACTION_PICK);
57.                     intent3.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE);
58.                     startActivityForResult(intent3, 0);
59. break;
60.             }
61.         }
62.     }
63. }

1. package com.example.myapplication02;
2. 
3. import androidx.appcompat.app.AppCompatActivity;
4. import android.content.Intent;
5. import android.os.Bundle;
6. import android.view.View;
7. import android.widget.AdapterView;
8. import android.widget.ArrayAdapter;
9. import android.widget.ListView;
10. import android.widget.TextView;
11. 
12. public class ActivityJump02 extends AppCompatActivity {
13. private ListView lv;
14. private String[] phone = {"110", "120", "119"};
15. 
16. @Override
17. protected void onCreate(Bundle savedInstanceState) {
18. super.onCreate(savedInstanceState);
19.         setContentView(R.layout.activity_jump02);
20.         lv = findViewById(R.id.lv);
21.         lv.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, phone));
22.         lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
23. @Override
24. public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
25. //返回选中的电话号码
26.                 Intent data=new Intent();
27.                 data.putExtra("phone",phone[position]);
28.                 setResult(1,data);
29.                 finish();
30.             }
31.         });
32.     }
33. }

1. <?xml version="1.0" encoding="utf-8"?>
2. <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. xmlns:app="http://schemas.android.com/apk/res-auto"
4. xmlns:tools="http://schemas.android.com/tools"
5. android:layout_width="match_parent"
6. android:layout_height="match_parent"
7. android:background="@drawable/p01"
8. tools:context=".ActivityJump01">
9. 
10. <Button
11. android:id="@+id/btn_Send"
12. android:layout_width="wrap_content"
13. android:layout_height="wrap_content"
14. android:text="发送短信"
15. app:layout_constraintBottom_toBottomOf="parent"
16. app:layout_constraintEnd_toEndOf="parent"
17. app:layout_constraintStart_toStartOf="parent"
18. app:layout_constraintTop_toTopOf="parent" />
19. 
20. <EditText
21. android:id="@+id/editTextTextPersonName"
22. android:layout_width="242dp"
23. android:layout_height="66dp"
24. android:layout_marginTop="188dp"
25. android:layout_marginEnd="6dp"
26. android:ems="10"
27. android:hint="点击选择联系人"
28. android:inputType="textPersonName"
29. app:layout_constraintEnd_toStartOf="@+id/btn_open"
30. app:layout_constraintStart_toStartOf="parent"
31. app:layout_constraintTop_toTopOf="parent" />
32. 
33. <Button
34. android:id="@+id/btn_open"
35. android:layout_width="wrap_content"
36. android:layout_height="wrap_content"
37. android:layout_marginEnd="2dp"
38. android:text="选择联系人"
39. app:layout_constraintBaseline_toBaselineOf="@+id/editTextTextPersonName"
40. app:layout_constraintEnd_toEndOf="parent"
41. app:layout_constraintStart_toEndOf="@+id/editTextTextPersonName" />
42. </androidx.constraintlayout.widget.ConstraintLayout>

1. <?xml version="1.0" encoding="utf-8"?>
2. <androidx.constraintlayout.widget.ConstraintLayout
3. xmlns:android="http://schemas.android.com/apk/res/android"
4. xmlns:app="http://schemas.android.com/apk/res-auto"
5. xmlns:tools="http://schemas.android.com/tools"
6. android:layout_width="match_parent"
7. android:layout_height="match_parent"
8. tools:context=".ActivityJump02">
9. 
10. <ListView
11. android:id="@+id/lv"
12. android:layout_width="0dp"
13. android:layout_height="0dp"
14. app:layout_constraintEnd_toEndOf="parent"
15. app:layout_constraintStart_toStartOf="parent"
16. app:layout_constraintTop_toTopOf="parent"
17. app:layout_constraintBottom_toBottomOf="parent"/>
18. </androidx.constraintlayout.widget.ConstraintLayout>