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D/: 用戶名:111111 , 密碼:222222
filesDir==/data/data/com.example.classtask/files
D/: file==/mounted/data/data/com.example.classtask/files/info.txt
写入失败!!!
V/RenderScript: 0xaec6b400 Launching thread(s), CPUs 2
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
public class QQTest extends AppCompatActivity {
private EditText user_id;
private EditText user_password;
private Button login;
private String uid;
private String upassword;
//初始化
void Init() {
user_id = findViewById(R.id.user_id);
user_password = findViewById(R.id.user_password);
login = findViewById(R.id.login);
}
void SaveData() {
//文字工具检查是否为空
if (TextUtils.isEmpty(user_id.getText()) || TextUtils.isEmpty(user_password.getText())) {
Toast.makeText(QQTest.this, "请将数据补充完整", Toast.LENGTH_SHORT).show();
} else {
//获取输入框内容
uid = user_id.getText().toString();
upassword = user_password.getText().toString();
Log.d("", "用戶名:" + uid + " , 密碼:" + upassword);
Save(uid, upassword);
}
}
private void Save(String uid, String upassword) {
//获得路径
File FilePath = this.getFilesDir();
Log.d("", "filesDir==" + FilePath.toString());
//获得绝对路径
String FileName =FilePath+ "/info.txt";
File info = new File(FileName);
Log.d("", "file==" + info.getAbsolutePath());
try {
//是否创建成功
if (info.exists()) {
Log.d("", "info.txt创建成功!");
//写入数据
FileOutputStream fos = new FileOutputStream(info);
fos.write((uid + "***" + upassword).getBytes());
fos.close();
Log.d("", "info.txt写入成功!");
Toast.makeText(QQTest.this, "数据保存成功!!", Toast.LENGTH_SHORT).show();
} else {
//写入失败
Log.d("", "写入失败!!!");
Toast.makeText(QQTest.this, "数据保存失败!!", Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_qqtest);
//控件初始化
Init();
//登录按钮的点击事件
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//保存数据
SaveData();
}
});
}
}