可能原因包括：驅(qū)動未安裝、數(shù)據(jù)線問題、手機USB調(diào)試未正確開啟、電腦端權(quán)限未授予或系統(tǒng)設(shè)置限制。建議檢查數(shù)據(jù)線是否正常，確認(rèn)驅(qū)動安裝，確保手機授權(quán)彈窗已允許，嘗試更換接口或數(shù)據(jù)線測試連接穩(wěn)定性。

可能原因有：數(shù)據(jù)線損壞，嘗試換根線；電腦未安裝合適驅(qū)動，需安裝對應(yīng)手機驅(qū)動；手機設(shè)置中選擇的USB連接模式不正確，可切換模式再試。

可能原因有：數(shù)據(jù)線損壞、電腦未安裝手機驅(qū)動、手機USB接口接觸不良、電腦USB接口故障、手機設(shè)置里有其他限制（如安全軟件阻止）等。

你只要到手機里面設(shè)置-程序-安裝與調(diào)試-打開USB調(diào)試，必須找到USB調(diào)試打開然后系統(tǒng)自動安裝驅(qū)動，安裝完畢后就可以了。

如果你的手機是插在電腦前邊的有可能是你電腦前邊插口電壓不穩(wěn)的原因，如果是的話試著插在電腦后邊。或者你的電腦沒有你手機的驅(qū)動.....

驅(qū)動重裝下看看

你好！
進入“設(shè)置”——“全部設(shè)置”界面——“關(guān)于手機”——連續(xù)快速點擊“android版本”5次，即可打開“開發(fā)者選項”，進入“開發(fā)者選項”，就可找到usb調(diào)試了。
希望能幫到你，望采納！

這是電腦中還缺少手機驅(qū)動程序所致，解決辦法是：
1、必須要先打開“USB調(diào)試”；
2、分別在電腦和手機下載安裝 豌 豆 莢 軟件，用USB線將手機與電腦連接，電腦中的 豌 豆 莢會自動在網(wǎng)上搜索并安裝適合你手機的驅(qū)動，在手機彈出的USB選項中選手第二項“媒體設(shè)備（MTP）”，確認(rèn)與電腦連接了。安裝豌 豆 莢以后，可選擇Wifi連接方式，可通過wiFi實現(xiàn)無線連接，不需USB線。

不知道
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