【contentprovider系列四】删除联系人信息

说明

根据输入的联系人姓名，来删除该联系人的所有的信息。

效果

布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >

    <EditText
            android:id="@+id/name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入要删除的联系人名字"
            />

    <Button
            android:id="@+id/delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="删除"
            />
</LinearLayout>

activity书写

package com.example.myapp;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MyActivity extends Activity {

    private EditText name;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        name = (EditText) findViewById(R.id.name);
        Button delete = (Button) findViewById(R.id.delete);

        delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String nameStr = name.getText().toString();

                //先查询到name对应的rawcontactsid
                ContentResolver cr = getContentResolver();
                int re = cr.delete(ContactsContract.RawContacts.CONTENT_URI,
                         "display_name = ?",
                        new String[]{nameStr}
                );

                if (re > 0) {
                    Toast.makeText(MyActivity.this, "删除成功", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}