该应用正在获取一个输入号码,并有一个拨打电话的按钮。我想保存输入供以后使用,并尝试使用共享首选项。
public class MainActivity extends AppCompatActivity {
Button myButton = null;
EditText numberCall = null;
int PERMISSION_ALL = 1;
String[] PERMISSIONS = {Manifest.permission.READ_CONTACTS, Manifest.permission.CALL_PHONE};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
拨打电话的按钮:
myButton = (Button) findViewById(R.id.button);
我想保存numberCall!
numberCall = (EditText) findViewById(R.id.editText);
要求许可
if(!hasPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
OnCallBtnClicked();
}
});
}
拨打电话
private void OnCallBtnClicked() {
Integer num = Integer.valueOf(numberCall.getText().toString());
Intent call = new Intent(Intent.ACTION_CALL);
call.setData(Uri.parse("tel:" +"0"+num));
startActivity(call);
}
public static boolean hasPermissions(Context context, String... permissions) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
}
return true;
}
答案 0 :(得分:0)
共享偏好是最简单的解决方案。将您的OnCallBtnClicked
方法更改为:
private void OnCallBtnClicked() {
Integer num = Integer.valueOf(numberCall.getText().toString());
Intent call = new Intent(Intent.ACTION_CALL);
call.setData(Uri.parse("tel:" +"0"+num));
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME,MODE_PRIVATE).edit();
editor.putString("Phone", "0"+num);
editor.commit();
startActivity(call);
}
获取您保存的值,请尝试以下操作:
SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
String restoredText = prefs.getString("Phone", null);
if (restoredText != null) {
String phone= prefs.getString("Phone", "No value defined");//"No valuedefined" is the default value.
}
答案 1 :(得分:0)
@TsurYohananov 如果要添加数据库,则很容易获得用户存储的值
Firebase数据库具有提供此功能的功能。 youtube上还有更多视频可供参考。