Question

我想删除手机上的所有短信，除了每次会话的最后500条短信。这是我的代码，但速度非常慢（删除一条短信大约需要10秒钟）。我如何加快这段代码：

    ContentResolver cr = getContentResolver();
    Uri uriConv = Uri.parse("content://sms/conversations");
    Uri uriSms = Uri.parse("content://sms/");
    Cursor cConv = cr.query(uriConv, 
            new String[]{"thread_id"}, null, null, null);

    while(cConv.moveToNext()) {
        Cursor cSms = cr.query(uriSms, 
                null,
                "thread_id = " + cConv.getInt(cConv.getColumnIndex("thread_id")),
                null, "date ASC");
        int count = cSms.getCount();
        for(int i = 0; i < count - 500; ++i) {
            if (cSms.moveToNext()) {
                cr.delete(
                        Uri.parse("content://sms/" + cSms.getInt(0)), 
                        null, null);
            }
        }
        cSms.close();
    }
    cConv.close();

Answer 1

您可以做的主要事情之一是batch ContentProvider operations，而不是进行33,900次单独删除：

// Before your loop
ArrayList<ContentProviderOperation> operations = 
    new ArrayList<ContentProviderOperation>();

// Instead of cr.delete use
operations.add(new ContentProviderOperation.newDelete(
    Uri.parse("content://sms/" + cSms.getInt(0))));

// After your loop
try {
    cr.applyBatch("sms", operations); // May also try "mms-sms" in place of "sms"
} catch(OperationApplicationException e) {
    // Handle the error
} catch(RemoteException e) {
    // Handle the error
}

向上指示您是要为每个对话执行一次批处理操作还是对整个SMS历史记录执行一次批处理操作。

使用contentResolver删除SMS太慢

1 个答案: