将数据插入数据库android后如何按顺序更改textview

Question

我的要求是，

我有 1 号预告片和电影名称。现在，一旦我在表中插入数据，我需要将文本更改为 Trailer Number 2，直到 Trailer Number 5。因为只插入 5 个数据。此外，我将检查 Trailer Number 1 是否已经存在于表中。如果不存在，我在表格中插入，但如果存在，我将文本更改为 Trailer Number 2。这是它应该工作的确切场景。

但就我而言，当我插入第 1 号预告片时，它会跳转到第 5 号预告片，而不是不显示第 2 号预告片。

点击按钮后

boolean isFirstTrailerNumberExist = myDb.isExist("Trailer Number 1");
            boolean isSecondTrailerNumberExist = myDb.isExist("Trailer Number 2");
            boolean isThirdTrailerNumberExist = myDb.isExist("Trailer Number 3");
            boolean isFourthTrailerNumberExist = myDb.isExist("Trailer Number 4");
            boolean isFifthTrailerNumberExist = myDb.isExist("Trailer Number 5");

 if(isFirstTrailerNumberExist) {
                Toast.makeText(this, "Trailer Number 1 already Exist", Toast.LENGTH_SHORT)
                        .show();

            } else {
                boolean isInserted = myDb.insertData(trailerNumberName.getText().toString(),
                        trailerNumberCount.getText().toString());
                if(isInserted){

                    Toast.makeText(TrailerNumberActivity.this,"Inserted successfully",Toast.LENGTH_SHORT)
                            .show();
                    trailerNumberName.setText("Trailer Number 2");
                }
                else{
                    Toast.makeText(TrailerNumberActivity.this,"Insertion failed",Toast.LENGTH_SHORT)
                            .show();
                }
            }

if(isSecondTrailerNumberExist){
                Toast.makeText(this,"Trailer Number 2 already Exist",Toast.LENGTH_SHORT)
                        .show();
            }
            else {
                boolean isInserted = myDb.insertData(trailerNumberName.getText().toString(),
                        trailerNumberCount.getText().toString());
                if(isInserted){

                    Toast.makeText(TrailerNumberActivity.this,"Inserted successfully",Toast.LENGTH_SHORT)
                            .show();
                    trailerNumberName.setText("Trailer Number 3");
                }
                else{
                    Toast.makeText(TrailerNumberActivity.this,"Insertion failed",Toast.LENGTH_SHORT)
                            .show();
                }
            }
//the same repeats for third, fourth and fifth trailer too to check in db

if(isThirdTrailerNumberExist){
                Toast.makeText(this,"Trailer Number 3 already Exist",Toast.LENGTH_SHORT)
                        .show();
            }
            else {
                boolean isInserted = myDb.insertData(trailerNumberName.getText().toString(),
                        trailerNumberCount.getText().toString());
                if(isInserted){

                    Toast.makeText(TrailerNumberActivity.this,"Inserted successfully",Toast.LENGTH_SHORT)
                            .show();
                    trailerNumberName.setText("Trailer Number 4");
                }
                else{
                    Toast.makeText(TrailerNumberActivity.this,"Insertion failed",Toast.LENGTH_SHORT)
                            .show();
                }
            }

            if(isFourthTrailerNumberExist){
                Toast.makeText(this,"Trailer Number 4 already Exist",Toast.LENGTH_SHORT)
                        .show();
            }
            else {
                boolean isInserted = myDb.insertData(trailerNumberName.getText().toString(),
                        trailerNumberCount.getText().toString());
                if(isInserted){

                    Toast.makeText(TrailerNumberActivity.this,"Inserted successfully",Toast.LENGTH_SHORT)
                            .show();
                    trailerNumberName.setText("Trailer Number 5");
                }
                else{
                    Toast.makeText(TrailerNumberActivity.this,"Insertion failed",Toast.LENGTH_SHORT)
                            .show();
                }
            }

            if(isFifthTrailerNumberExist){
                Toast.makeText(this,"Trailer Number 5 already Exist",Toast.LENGTH_SHORT)
                        .show();
            }
            else {
                boolean isInserted = myDb.insertData(trailerNumberName.getText().toString(),
                        trailerNumberCount.getText().toString());
                if(isInserted){

                    Toast.makeText(TrailerNumberActivity.this,"Inserted successfully",Toast.LENGTH_SHORT)
                            .show();
                    trailerNumberName.setText("Trailer Number 1");
                }
                else{
                    Toast.makeText(TrailerNumberActivity.this,"Insertion failed",Toast.LENGTH_SHORT)
                            .show();
                }
            }

这就是我重复显示直到预告片 5 的方式，但问题是在插入预告片 1 后，它会跳转到预告片 5。

Answer 1

当然它会跳转到第 5 号预告片，因为当您最初单击按钮时，所有 ---TrailerNumberExist 将返回 false，因此它会将文本依次设置为“预告片编号 2”、“预告片编号 3”等等，直到它停在“Trailer Number 5”

这样做

 if(!isFirstTrailerNumberExist) {
    // insert and show your entry here
    insertDataAndUpdateText("Trailer Number 2");
}else if(!isSecondTrailerNumberExist){
    // insert and show your entry here
    insertDataAndUpdateText("Trailer Number 3");
}else if(!isThirdTrailerNumberExist){
    // insert and show your entry here
    insertDataAndUpdateText("Trailer Number 4");
} 

等等.. 使用单一方法使您的代码优化

现在它将在按钮单击时按顺序输入并显示输出