android 安卓经过putExtra传递数据的几种方式

1，mainActivity.java

Intent intent = new Intent(add_task.this, sortlist_java.class);
                startActivityForResult(intent,0);

 0表明请求码，用来标志请求方的符号。

2，在请求java文件里面重写onActivityResults方法

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//        super.onActivityResult(requestCode, resultCode, data);

        et1=(EditText)findViewById(R.id.sortEdit);  //分类文本框
        et5=(EditText)findViewById(R.id.remarkEdit);//备注文本框
        if (requestCode == 0 && resultCode == 0) {
            String resultsort = data.getStringExtra("sort");
            et1.setText(resultsort);

        }

        //备注值
        if (requestCode == 3 && resultCode == 3){
            String result=data.getStringExtra("remark");
            Toast.makeText(add_task.this,result,Toast.LENGTH_LONG).show();
            et5.setText(result);

        }
    }

3，,请求须要返回数据的界面.java

//确认按钮返回给add_task文本框的值
        ib1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String editstring = et1.getText().toString();
                Intent intent = getIntent();
                Bundle data = new Bundle();
                data.putString("sort", editstring);
                intent.putExtras(data);
                sortlist_java.this.setResult(0, intent);
                sortlist_java.this.finish();
            }
        });