利用ContentResolver，点击查看短信按钮，读取Android系统的短信内容，并显示在Listview列表中,查看源码

以下是一个简单的例子，演示如何通过ContentResolver读取短信内容并显示在ListView中。

1. 首先，在AndroidManifest.xml文件中添加以下权限：

<uses-permission android:name="android.permission.READ_SMS"/>

2. 在布局文件中添加一个ListView控件：

<ListView
    android:id="@+id/listView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

3. 在Activity中获取ListView对象，并创建一个SimpleCursorAdapter对象：

public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private SimpleCursorAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.listView);

        String[] from = new String[]{"address", "body"};
        int[] to = new int[]{android.R.id.text1, android.R.id.text2};
        adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, null, from, to, 0);
        listView.setAdapter(adapter);
    }
}

4. 使用ContentResolver查询短信数据，并将查询结果赋值给Cursor对象：

public class MainActivity extends AppCompatActivity {
    // ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // ...

        Uri uri = Uri.parse("content://sms/inbox");
        String[] projection = new String[]{"_id", "address", "body"};
        Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
        adapter.swapCursor(cursor);
    }
}

5. 将Cursor对象与SimpleCursorAdapter对象关联，将查询结果显示在ListView中：

public class MainActivity extends AppCompatActivity {
    // ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // ...

        adapter.swapCursor(cursor);
    }
}

完整的代码示例如下：

public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private SimpleCursorAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.listView);

        String[] from = new String[]{"address", "body"};
        int[] to = new int[]{android.R.id.text1, android.R.id.text2};
        adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, null, from, to, 0);
        listView.setAdapter(adapter);

        Uri uri = Uri.parse("content://sms/inbox");
        String[] projection = new String[]{"_id", "address", "body"};
        Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
        adapter.swapCursor(cursor);
    }
}